Symptoms - Lighting Systems
| IMPORTANT | The following steps must be completed before using a symptom table. |
- Perform the «Diagnostic System Check - Vehicle»(/cadillac/sts/i-2004-2007/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information before using a symptom table in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the GMLAN serial data circuit.
- Review the system description and operation in order to familiarize yourself with the system functions. Refer to the following: «Exterior Lighting Systems Description and Operation»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-introduction) «Interior Lighting Systems Description and Operation»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-introduction)
Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the lighting system. Refer to «Checking Aftermarket Accessories»(/cadillac/sts/i-2004-2007/remont/body-electrical/#wiring-systems-electrical-power-management-introduction__checking-aftermarket-accessories) in Wiring Systems.
- Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
Intermittent
Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom
- «Backup Lamps Always On»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__backup-lamps-always-on)
- «Backup Lamps Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__backup-lamps-inoperative)
- «Cornering Lamps Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__cornering-lamps-inoperative)
- «Courtesy Lamps Always On»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__courtesy-lamps-always-on)
- «Courtesy Lamps Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__courtesy-lamps-inoperative)
- «Daytime Running Lamps (DRL) Inoperative (Domestic/Canadian)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__daytime-running-lamps-drl-inoperative-domesticcanadian) or «Daytime Running Lamps (DRL) Inoperative (Norway/Sweden)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__daytime-running-lamps-drl-inoperative-norwaysweden)
- «Fog Lamp Indicator Always On»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__fog-lamp-indicator-always-on)
- «Fog Lamp Indicator Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__fog-lamp-indicator-inoperative)
- «Fog Lamp Indicator Always On - Rear (Export)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__fog-lamp-indicator-always-on)
- «Fog Lamp Indicator Inoperative - Rear (Export)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__fog-lamp-indicator-inoperative-rear)
- «Fog Lamps Always On»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__fog-lamps-always-on)
- «Fog Lamps Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__fog-lamps-inoperative)
- «Fog Lamps Always On - Rear»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__fog-lamps-always-on-rear)
- «Fog Lamps Inoperative - Rear»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__fog-lamps-inoperative-rear)
- «Hazard Lamps Always On»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__hazard-lamps-always-on)
- «Hazard Lamps Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__hazard-lamps-inoperative)
- «Headlamps Always On - Low or High Beam (Standard)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__headlamps-always-on-low-or) or «Headlamps Always On - Low or High Beam (with Intellibeam)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__headlamps-always-on-low-or)
- «Headlamps Inoperative - High Beams (Standard)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__headlamps-inoperative-high-beams-standard) or «Headlamps Inoperative - High Beams (with Intellibeam)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__headlamps-inoperative-high-beams-with)
- «Headlamps Inoperative - Low Beams (Standard Headlamps)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__headlamps-inoperative-low-beams-standard) or «Headlamps Inoperative - Low Beams (HID Headlamps)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__headlamps-inoperative-low-beams-hid)
- «Headlamps Inoperative - Flash to Pass»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__headlamps-inoperative-flash-to-pass)
- «High Beam Indicator Always On»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__high-beam-indicator-always-on)
- «High Beam Indicator Inoperative (Standard)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__high-beam-indicator-inoperative-standard) or «High Beam Indicator Inoperative (with Intellibeam)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__high-beam-indicator-inoperative-with-intellibeam)
- «Illuminated Entry Lamps Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__illuminated-entry-lamps-inoperative)
- «Interior Backlighting Does Not Dim»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__interior-backlighting-does-not-dim)
- «Interior Backlighting Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__interior-backlighting-inoperative)
- «Instrument Panel (I/P) Compartment Lamp Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__instrument-panel-ip-compartment-lamp-inoperative)
- «License Lamps Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__license-lamps-inoperative)
- «Lights On Indicator Always On»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__lights-on-indicator-always-on)
- «Lights On Indicator Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__lights-on-indicator-inoperative)
- «Park Lamps Always On»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__park-lamps-always-on)
- «Park Lamps Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__park-lamps-inoperative)
- «Reading Lamp(s) Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__reading-lamps-inoperative)
- «Rear Compartment Lamp(s) Always On»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__rear-compartment-lamps-always-on)
- «Rear Compartment Lamp(s) Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__rear-compartment-lamps-inoperative)
- «Repeater Lamps Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__repeater-lamps-inoperative)
- «Stop Lamps Always On»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms)
- «Stop Lamps Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms)
- «Turn Signal Lamps and/or Indicators Always On or Flashing»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__turn-signal-lamps-andor-indicators-always)
- «Turn Signal Lamps and/or Indicators Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__turn-signal-lamps-andor-indicators-inoperative)
- «Twilight Sentinel Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__twilight-sentinel-inoperative)
- «Vanity Mirror Lamp(s) Always On»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__vanity-mirror-lamps-always-on)
- «Vanity Mirror Lamp(s) Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-symptoms__vanity-mirror-lamps-inoperative)
Backup Lamps Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Install a scan tool. Turn ON the ignition, with the engine OFF. With the scan tool, command the Backup Lamp Relay Cmd. ON and OFF from the rear integration module (RIM) output controls data list. Listen for the backup lamp relay to click as it is cycled from ON to OFF. Does the backup lamp relay turn ON and OFF with each command? | Go to Step 3 | Go to Step 4 |
| 3 | Turn OFF the ignition. Disconnect the reverse lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Turn ON the ignition, with the engine OFF. Do the backup lamps turn OFF? | Go to Step 4 | Go to Step 8 |
| 4 | Turn OFF the ignition. Disconnect the reverse lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Connect a test lamp between the reverse lamp relay control side supply voltage circuit and the reverse lamp relay control circuit. Turn ON the ignition, with the engine OFF. With a scan tool, command the Backup Lamp Relay ON and OFF. Does the test lamp turn ON and OFF with each command? | Go to Step 6 | Go to Step 5 |
| 5 | Test the reverse lamp relay control circuit for a short ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 |
| 6 | Inspect for poor connections at the reverse lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 |
| 7 | Inspect for poor connections at the harness connector of the RIM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 |
| 8 | Test the backup lamp supply voltage circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 11 | |
| 9 | Replace the reverse lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 11 | |
| 10 | Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 11 | |
| 11 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Backup Lamps Always On
Backup Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Install a scan tool. Turn ON the ignition, with the engine OFF. With the scan tool, command the Backup Lamp Relay Cmd. ON and OFF from the rear integration module (RIM) output controls data list. Listen for the backup lamp relay to click as it is cycled from ON to OFF. Does the backup lamp relay turn ON and OFF with each command? | Go to Step 5 | Go to Step 3 |
| 3 | Turn OFF the ignition. Disconnect the reverse lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Turn ON the ignition, with the engine OFF. Probe the reverse lamp relay control side supply voltage circuit with a test lamp that is connected to ground. Does the test lamp illuminate? | Go to Step 4 | Go to Step 13 |
| 4 | Turn OFF the ignition. Connect a test lamp between the reverse lamp relay control side supply voltage circuit and the reverse lamp relay control circuit. Turn ON the ignition, with the engine OFF. With a scan tool, command the Backup Lamp Relay ON and OFF. Does the test lamp turn ON and OFF with each command? | Go to Step 11 | Go to Step 8 |
| 5 | Turn OFF the ignition. Disconnect the reverse lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Turn ON the ignition, with the engine OFF. Probe the reverse lamp relay switch side supply voltage circuit with a test lamp that is connected to ground. Does the test lamp illuminate? | Go to Step 6 | Go to Step 14 |
| 6 | Turn OFF the ignition. Connect a 10-amp fused jumper between the reverse lamp relay switch side supply voltage circuit and the backup lamp supply voltage circuit. Turn ON the ignition, with the engine OFF. Do both backup lamps illuminate? | Go to Step 11 | Go to Step 7 |
| 7 | Turn OFF the ignition. Remove the inoperative backup lamp bulb. Connect a test lamp between the backup lamp supply voltage circuit and the backup lamp ground circuit. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 10 | Go to Step 9 |
| 8 | Test the reverse lamp relay control circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 12 |
| 9 | Test the inoperative backup lamp supply voltage circuit for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 15 |
| 10 | Inspect for poor connections at the backup lamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 17 |
| 11 | Inspect for poor connections at the reverse lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 16 |
| 12 | Inspect for poor connections at the harness connector of the RIM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 18 |
| 13 | Locate and repair an open or high resistance in the reverse lamp relay control side supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 19 | |
| 14 | Locate and repair an open or high resistance in the reverse lamp relay switch side supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 19 | |
| 15 | Locate and repair an open or high resistance in the inoperative backup lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 19 | |
| 16 | Replace the reverse lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 19 | |
| 17 | Replace the backup lamp bulb. Refer to Tail Lamp, Turn Signal Lamp, High Mount Stop Lamp, License Lamp, Backup Lamp Replacement - Rear . Did you complete the replacement? | Go to Step 19 | |
| 18 | Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 19 | |
| 19 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Backup Lamps Inoperative
Cornering Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the park lamps operate properly? | Go to Step 3 | Go to Park Lamps Inoperative |
| 3 | Turn OFF the ignition. Remove the inoperative cornering/side marker lamp bulb. Connect a test lamp between the inoperative cornering/side marker lamp supply voltage circuit and the ground circuit of the inoperative cornering/side marker lamp. Turn ON the ignition, with the engine OFF. Turn ON the park lamps. Does the test lamp illuminate? | Go to Step 5 | Go to Step 4 |
| 4 | Test the inoperative cornering/side marker lamp supply voltage circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 6 |
| 5 | Inspect for poor connections at the inoperative cornering/side marker lamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 7 |
| 6 | Locate and repair an open or high resistance in the ground circuit of the inoperative cornering/side marker lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 8 | |
| 7 | Replace the inoperative cornering/side marker lamp bulb. Refer to Headlamp, Fog Lamp, Turn Signal Lamp, Side Marker Lamp Replacement - Front or Tail Lamp, Turn Signal Lamp, High Mount Stop Lamp, License Lamp, Backup Lamp Replacement - Rear . Did you complete the replacement? | Go to Step 8 | |
| 8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Cornering Lamps Inoperative
Courtesy Lamps Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Schematics and Door Control Module Schematics in Doors Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Close all doors. Turn OFF the interior lamp switch. Turn ON the ignition, with the engine OFF. Are the courtesy lamps ON? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Install a scan tool. Close all doors. With a scan tool, observe the Door Open Switch parameter in the individual door module data lists. Does the scan tool indicate that the Door Open Switch parameter is CLOSED for all doors? | Go to Step 4 | Go to Step 6 |
| 4 | Turn the interior lamp switch to the OFF position. With a scan tool, observe the Courtesy Lamp Switch parameter in the instrument panel module (IPM) inputs data list. Does the scan tool display OFF? | Go to Step 9 | Go to Step 5 |
| 5 | Turn OFF the ignition. Disconnect the instrument panel (I/P) dimmer switch. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Courtesy Lamp Switch parameter in the IPM inputs data list. Does the scan tool display OFF? | Go to Step 10 | Go to Step 8 |
| 6 | Turn OFF the ignition. Disconnect the inoperative door latch assembly. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Door Open Switch parameter in the appropriate door module data list. Does the scan tool indicate that the Door Open Switch parameter is CLOSED? | Go to Step 11 | Go to Step 7 |
| 7 | Test the door open switch signal circuit of the inoperative door latch assembly for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 12 |
| 8 | Test the courtesy lamp switch ON signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 13 |
| 9 | Test the courtesy lamp relay control circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 14 |
| 10 | Inspect for poor connections at the harness connector of the I/P dimmer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 15 |
| 11 | Inspect for poor connections at the harness connector of the inoperative door latch assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 16 |
| 12 | Inspect for poor connections at the harness connector of the inoperative door control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 17 |
| 13 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 18 |
| 14 | Inspect for poor connections at the harness connector of the rear integration module (RIM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 19 |
| 15 | Replace I/P dimmer switch. Refer to Instrument Panel (I/P) Dimmer Switch Replacement . Did you complete the replacement? | Go to Step 20 | |
| 16 | Replace the inoperative door latch assembly. Refer to Lock Assembly, Inside Handle Cable Assembly Replacement - Front Door (w/o UA2) or Lock Assembly, Inside Handle Cable Assembly Replacement - Front Door (UA2) or Latch Replacement - Rear Door in Doors. Did you complete the replacement? | Go to Step 20 | |
| 17 | Replace the inoperative door control module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 20 | |
| 18 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 20 | |
| 19 | Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 20 | |
| 20 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Courtesy Lamps Always On
Courtesy Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Schematics and Door Control Module Schematics in Doors Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | IMPORTANT: The sunload sensor assembly must indicate low light conditions for the interior lamps to operate. Cover the sunload sensor assembly. Turn ON the ignition, with the engine OFF. Observe the courtesy lamps. Open and close all of the doors. Turn the interior lamp switch ON and OFF. Turn OFF the ignition. Do the courtesy lamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Install a scan tool. Turn ON the ignition, with the engine OFF. Observe the Ambient Light Status parameter in the HVAC lighting data list. Cover the sunload sensor assembly. Does the scan tool display DARK? | Go to Step 4 | Go to Twilight Sentinel Inoperative |
| 4 | With a scan tool, command the Courtesy Lamps ON from the rear integration module (RIM) lighting output controls data list. Do all of the interior courtesy lamps turn ON? | Go to Step 6 | Go to Step 5 |
| 5 | Are all interior courtesy lamps inoperative? | Go to Step 10 | Go to Step 14 |
| 6 | Turn the interior lamp switch ON. With a scan tool, observe the Courtesy Lamp Switch parameter in the instrument panel module (IPM) inputs data list. Does the scan tool display ON? | Go to Step 7 | Go to Step 8 |
| 7 | Open all the doors. Turn ON the ignition, with the engine OFF. With a scan tool, observe all Door Open Switch parameters in the individual door module data lists. Does the scan tool display OPEN for all Door Open Switch inputs? | Go to Step 28 | Go to Step 9 |
| 8 | Disconnect the instrument panel (I/P) dimmer switch. Connect a 3-amp fused jumper between the courtesy lamp switch ON signal circuit and the I/P dimmer switch low reference circuit at the I/P dimmer switch harness connector. With a scan tool, observe the Courtesy Lamp Switch parameter. Does the scan tool display ON? | Go to Step 25 | Go to Step 15 |
| 9 | Turn OFF the ignition. Disconnect the inoperative door latch assembly. Connect a 3-amp fused jumper between the door open switch signal circuit of the inoperative door latch and the ground circuit of the door latch assembly. Turn ON the ignition, with the engine OFF. With a scan tool, observe the inoperative Door Open Switch input parameter. Does the scan tool display OPEN for the inoperative Door Open Switch input? | Go to Step 23 | Go to Step 17 |
| 10 | Turn OFF the ignition. Disconnect the interior lamp relay located in the right rear fuse block. Turn ON the ignition, with the engine OFF. Turn the interior lamp switch ON. Probe the interior lamp relay control side supply voltage circuit with a test lamp connected to ground. Does the test lamp illuminate? | Go to Step 11 | Go to Step 30 |
| 11 | Probe the interior lamp relay switch side supply voltage circuit with a test lamp that is connected to ground. Does the test lamp illuminate? | Go to Step 12 | Go to Step 29 |
| 12 | Connect a test lamp between the interior lamp relay control side supply voltage circuit and the courtesy lamp relay control circuit. Does the test lamp Illuminate? | Go to Step 13 | Go to Step 21 |
| 13 | Connect a test lamp between the switch side supply voltage circuit of the interior lamp relay and the courtesy lamp supply control circuit of the interior lamp relay. Do the test lamp illuminate? | Go to Step 22 | Go to Step 19 |
| 14 | Turn ON the courtesy lamps. Remove the inoperative courtesy lamp bulb. Connect a test lamp between the inoperative courtesy lamp supply voltage circuit and the ground circuit of the inoperative courtesy lamp. Does the test lamp illuminate? | Go to Step 28 | Go to Step 19 |
| 15 | Test the courtesy lamp switch ON signal circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 16 |
| 16 | Test the I/P dimmer switch low reference circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 26 |
| 17 | Test the inoperative door open switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 18 |
| 18 | Test the inoperative door latch assembly ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 24 |
| 19 | Test the courtesy lamp supply voltage circuit for an open, high resistance, or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 20 |
| 20 | Test the courtesy lamp supply control circuit for an open or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 27 |
| 21 | Test the courtesy lamp relay control circuit for an open, high resistance, or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 27 |
| 22 | Inspect for poor connections at the interior lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 31 |
| 23 | Inspect for poor connections at the harness connector of the inoperative door latch assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 32 |
| 24 | Inspect for poor connections at the harness connector of the inoperative door control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 33 |
| 25 | Inspect for poor connections at the harness connector of the I/P dimmer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 34 |
| 26 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 35 |
| 27 | Inspect for poor connections at the harness connector of the RIM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 36 |
| 28 | Inspect for poor connections at the inoperative courtesy lamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 38 | Go to Step 37 |
| 29 | Locate and repair an open, high resistance, or short to ground in the switch side supply voltage circuit of the interior lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 38 | |
| 30 | Locate and repair an open, high resistance, or short to ground in the control side supply voltage circuit of the interior lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 38 | |
| 31 | Replace the in interior lamp relay. Refer to Wiring Repairs in Wiring Systems. Did you complete the replacement? | Go to Step 38 | |
| 32 | Replace the inoperative door latch assembly. Refer to Lock Assembly, Inside Handle Cable Assembly Replacement - Front Door (w/o UA2) or Lock Assembly, Inside Handle Cable Assembly Replacement - Front Door (UA2) or Latch Replacement - Rear Door in Doors. Did you complete the replacement? | Go to Step 38 | |
| 33 | Replace the inoperative door control module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 38 | |
| 34 | Replace I/P dimmer switch. Refer to Instrument Panel (I/P) Dimmer Switch Replacement . Did you complete the replacement? | Go to Step 38 | |
| 35 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 38 | |
| 36 | Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 38 | |
| 37 | Replace the inoperative courtesy lamp bulb. Refer to Courtesy Lamp Replacement - Instrument Panel - Right and Courtesy Lamp Replacement - Overhead Console (FRONT) or Courtesy Lamp Replacement - Overhead Console (REAR) . Did you complete the replacement? | Go to Step 38 | |
| 38 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
| IMPORTANT |
|---|
| The sunload sensor assembly must indicate low light conditions for the interior lamps to operate. |
Courtesy Lamps Inoperative
Daytime Running Lamps (DRL) Inoperative (Domestic/Canadian)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the turn signals operate properly? | Go to Step 3 | Go to Turn Signal Lamps and/or Indicators Inoperative |
| 3 | Verify that the park brake is not APPLIED. Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Parking Brake Switch parameter in the instrument panel module (IPM) inputs list. Does the scan tool display RELEASED? | Go to Step 4 | Go to Symptoms - Hydraulic Brakes in Hydraulic Brakes |
| 4 | Inspect for poor connections at the harness connector of the IPM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 5 |
| 5 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 6 | |
| 6 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Daytime Running Lamps (DRL) Inoperative (Domestic/Canadian)
Daytime Running Lamps (DRL) Inoperative (Norway/Sweden)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the low beam headlamps operate properly? | Go to Step 3 | Go to Headlamps Inoperative - Low Beams (Standard Headlamps) or Headlamps Inoperative - Low Beams (HID Headlamps) |
| 3 | Verify that the park brake is not APPLIED. Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Parking Brake Switch parameter in the instrument panel module (IPM) inputs list. Does the scan tool display RELEASED? | Go to Step 4 | Go to Symptoms - Hydraulic Brakes in Hydraulic Brakes |
| 4 | Turn OFF the ignition. Remove the headlamp low beam relay located in the underhood fuse block. Install a test lamp between the headlamp low beam relay battery voltage circuit terminal and the headlamp low beam relay control circuit terminal. Refer to Circuit Testing in Wiring Systems. Turn ON the ignition, with the engine OFF. Operate the DRL system. Does the test lamp illuminate? | Go to Step 6 | Go to Step 5 |
| 5 | Inspect for poor connections at the harness connector of the IPM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 7 |
| 6 | Replace the headlamp low beam relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 8 | |
| 7 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 8 | |
| 8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Daytime Running Lamps (DRL) Inoperative (Norway/Sweden)
Fog Lamp Indicator Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the front fog lamps operate properly? | Go to Step 3 | Go to Fog Lamps Always On |
| 3 | Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the repair? | Go to Step 5 | |
| 5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Fog Lamp Indicator Always On
Fog Lamp Indicator Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the front fog lamps operate properly? | Go to Step 3 | Go to Fog Lamps Inoperative |
| 3 | Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 5 | |
| 5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Fog Lamp Indicator Inoperative
Fog Lamp Indicator Always On - Rear (Export)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the rear fog lamps operate properly? | Go to Step 3 | Go to Fog Lamps Always On - Rear |
| 3 | Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the repair? | Go to Step 5 | |
| 5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Fog Lamp Indicator Always On - Rear (Export)
Fog Lamp Indicator Inoperative - Rear (Export)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the rear fog lamps operate properly? | Go to Step 3 | Go to Fog Lamps Inoperative - Rear |
| 3 | Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 5 | |
| 5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Fog Lamp Indicator Inoperative - Rear (Export)
Fog Lamps Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Install a scan tool. Turn ON the ignition, with the engine OFF. Place the front fog lamp switch in the OFF position. With a scan tool, observe the Front Fog Lamp Relay Status in the instrument panel module (IPM) outputs data list. Does the scan tool indicate the front fog lamp relay status parameter is OFF? | Go to Step 3 | Go to Step 5 |
| 3 | Turn OFF the ignition. Disconnect the front fog lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Turn ON the ignition, with the engine OFF. Do the front fog lamps turn OFF? | Go to Step 4 | Go to Step 11 |
| 4 | Turn OFF the ignition. Connect a test lamp between the front fog lamp relay control side supply voltage circuit and the front fog lamp relay control circuit. Place the front fog lamp switch in the OFF position. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 6 | Go to Step 10 |
| 5 | Turn OFF the ignition. Disconnect the C2 harness connector at the turn signal/multifunction switch. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Front Fog Lamp Relay Status parameter in the IPM outputs data list. Does the scan tool indicate the front fog lamp relay status parameter is OFF? | Go to Step 9 | Go to Step 7 |
| 6 | Test the front fog lamp relay control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 8 |
| 7 | Test the front fog lamp switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 8 |
| 8 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 12 |
| 9 | Inspect for poor connections at the harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 13 |
| 10 | Inspect for poor connections at the front fog lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 14 |
| 11 | Locate and repair a short to voltage in the front fog lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did to complete the repair? | Go to Step 15 | |
| 12 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 15 | |
| 13 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 15 | |
| 14 | Replace the front fog lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 15 | |
| 15 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Fog Lamps Always On
Fog Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Are both front fog lamps inoperative? | Go to Step 3 | Go to Step 9 |
| 3 | Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Front Fog Lamp Relay Status parameter in the instrument panel module (IPM) outputs data list. Turn the front fog lamp switch OFF and ON. Does the scan tool indicate the front fog lamp relay status parameter changes from OFF to ON as the fog lamp switch is activated? | Go to Step 5 | Go to Step 4 |
| 4 | Turn OFF the ignition. Disconnect the C2 harness connector at the turn signal/multifunction switch. Connect a 3-amp fused jumper between the front fog lamp switch signal circuit and the front fog lamp switch ground circuit. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Front Fog Lamp Relay Status parameter in the IPM outputs data list. Does the scan tool indicate the front fog lamp relay status parameter is ON? | Go to Step 15 | Go to Step 10 |
| 5 | Turn OFF the ignition. Disconnect the front fog lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Turn ON the ignition, with the engine OFF. Probe the front fog lamp relay control side supply voltage circuit with a test lamp connected to ground. Does the test lamp illuminate? | Go to Step 6 | Go to Step 20 |
| 6 | Probe the front fog lamp relay switch side supply voltage circuit with a test lamp that is connected to ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 19 |
| 7 | Turn OFF the ignition. Connect a test lamp between the front fog lamp relay control side supply voltage circuit and the front fog lamp relay control circuit. Turn ON the ignition, with the engine OFF. Place the front fog lamp switch in the ON position. Does the test lamp illuminate? | Go to Step 8 | Go to Step 13 |
| 8 | Turn OFF the ignition. Connect a 15-amp fused jumper between the front fog lamp relay switch side supply voltage circuit and the front fog lamp supply voltage circuit. Turn ON the ignition, with the engine OFF. Do both front fog lamps illuminate? | Go to Step 14 | Go to Step 12 |
| 9 | Turn OFF the ignition. Remove the inoperative front fog lamp bulb. Connect a test lamp between the inoperative front fog lamp supply voltage circuit and the inoperative front fog lamp ground circuit. Turn ON the ignition, with the engine OFF. Turn ON the front fog lamp switch. Does the test lamp illuminate? | Go to Step 17 | Go to Step 12 |
| 10 | Test the front fog lamp switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 11 |
| 11 | Test the front fog lamp switch signal circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 16 |
| 12 | Test the front fog lamp supply voltage circuit for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 18 |
| 13 | Test the front fog lamp relay control circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 16 |
| 14 | Inspect for poor connections at the front fog lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 21 |
| 15 | Inspect for poor connections at the harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 22 |
| 16 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 23 |
| 17 | Inspect for poor connections at the inoperative front fog lamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 24 |
| 18 | Locate and repair an open or high resistance in the front fog lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 25 | |
| 19 | Locate and repair an open or high resistance in the switch side supply voltage circuit of the front fog lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | |
| 20 | Locate and repair an open or high resistance in the control side supply voltage circuit of the front fog lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 25 | |
| 21 | Replace the front fog lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 25 | |
| 22 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement . Did you complete the replacement? | Go to Step 25 | |
| 23 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 25 | |
| 24 | Replace the inoperative front fog lamp bulb. Refer to Headlamp, Fog Lamp, Turn Signal Lamp, Side Marker Lamp Replacement - Front . Did you complete the replacement? | Go to Step 25 | |
| 25 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Fog Lamps Inoperative
Fog Lamps Always On - Rear
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Install a scan tool. Turn ON the ignition, with the engine OFF. Place the rear fog lamp switch in the OFF position. With a scan tool, observe the Rear Fog Lamp Relay Cmd. parameter in the rear integration module (RIM) lighting data list. Does the scan tool indicate the rear fog lamp relay cmd. parameter is OFF? | Go to Step 3 | Go to Step 5 |
| 3 | Turn OFF the ignition. Disconnect the rear fog lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Turn ON the ignition, with the engine OFF. Do the rear fog lamps turn OFF? | Go to Step 4 | Go to Step 13 |
| 4 | Turn OFF the ignition. Connect a test lamp between the rear fog lamp relay control side supply voltage circuit and the rear fog lamp relay control circuit. Place the rear fog lamp switch in the OFF position. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 6 | Go to Step 12 |
| 5 | Turn OFF the ignition. Disconnect the C2 harness connector at the turn signal/multifunction switch. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Rear Fog Lamp Relay Cmd. parameter in the rear integration module (RIM) lighting data list. Does the scan tool indicate the rear fog lamp relay cmd. parameter is OFF? | Go to Step 11 | Go to Step 7 |
| 6 | Test the rear fog lamp relay control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 10 |
| 7 | Test the rear fog lamp switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 8 |
| 8 | Turn OFF the ignition. Disconnect the C3 harness connector at the instrument panel module (IPM). Turn ON the ignition, with the engine OFF. Do the rear fog lamps turn OFF? | Go to Step 9 | Go to Step 10 |
| 9 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 17 |
| 10 | Inspect for poor connections at the harness connector of the RIM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 14 |
| 11 | Inspect for poor connections at the harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 15 |
| 12 | Inspect for poor connections at the rear fog lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 16 |
| 13 | Locate and repair a short to voltage in the rear fog lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did to complete the repair? | Go to Step 18 | |
| 14 | Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 18 | |
| 15 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement . Did you complete the replacement? | Go to Step 18 | |
| 16 | Replace the rear fog lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 18 | |
| 17 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 18 | |
| 18 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Fog Lamps Always On - Rear
Fog Lamps Inoperative - Rear
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Are both rear fog lamps inoperative? | Go to Step 3 | Go to Step 9 |
| 3 | Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool command the Rear Fog Lamps ON from the rear integration module (RIM) output controls special functions list. Do both rear fog lamps turn ON? | Go to Step 8 | Go to Step 4 |
| 4 | Turn OFF the ignition. Disconnect the rear fog lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Turn ON the ignition, with the engine OFF. Probe the rear fog lamp relay control side supply voltage circuit with a test lamp connected to ground. Does the test lamp illuminate? | Go to Step 5 | Go to Step 20 |
| 5 | Probe the rear fog lamp relay switch side supply voltage circuit with a test lamp connected to ground. Does the test lamp illuminate? | Go to Step 6 | Go to Step 21 |
| 6 | Turn OFF the ignition. Connect a test lamp between the rear fog lamp relay control side supply voltage circuit and the rear fog lamp relay control circuit. Turn ON the ignition, with the engine OFF. With a scan tool command the Rear Fog Lamps ON and OFF from the RIM output controls special functions list. Does the test lamp turn ON and OFF with each command? | Go to Step 7 | Go to Step 13 |
| 7 | Turn OFF the ignition. Connect a 15-amp fused jumper between the rear fog lamp relay switch side supply voltage circuit and the rear fog lamp supply voltage circuit. Turn ON the ignition, with the engine OFF. Do both rear fog lamps illuminate? | Go to Step 14 | Go to Step 12 |
| 8 | Turn OFF the ignition. Disconnect the C2 harness connector at the turn signal/multifunction switch. Connect a 3-amp fused jumper between the rear fog lamp switch signal circuit and the rear fog lamp switch ground circuit. Turn ON the ignition, with the engine OFF. Do the rear fog lamps turn ON? | Go to Step 15 | Go to Step 10 |
| 9 | Turn OFF the ignition. Remove the inoperative rear fog lamp bulb. Connect a test lamp between the inoperative rear fog lamp supply voltage circuit and the inoperative rear fog lamp ground circuit. Turn ON the ignition, with the engine OFF. Turn ON the rear fog lamp switch. Does the test lamp illuminate? | Go to Step 18 | Go to Step 12 |
| 10 | Test the rear fog lamp switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 27 | Go to Step 11 |
| 11 | Test the rear fog lamp switch signal circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 27 | Go to Step 17 |
| 12 | Test the rear fog lamp supply voltage circuit for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 27 | Go to Step 19 |
| 13 | Test the rear fog lamp relay control circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 27 | Go to Step 16 |
| 14 | Inspect for poor connections at the rear fog lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 27 | Go to Step 22 |
| 15 | Inspect for poor connections at the harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 27 | Go to Step 23 |
| 16 | Inspect for poor connections at the harness connector of the RIM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 27 | Go to Step 24 |
| 17 | Inspect for poor connections at the harness connector of the instrument panel module (IPM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 27 | Go to Step 25 |
| 18 | Inspect for poor connections at the inoperative rear fog lamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 27 | Go to Step 26 |
| 19 | Locate and repair an open or high resistance in the rear fog lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 27 | |
| 20 | Locate and repair an open or high resistance in the control side supply voltage circuit of the rear fog lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 27 | |
| 21 | Locate and repair an open or high resistance in the switch side supply voltage circuit of the rear fog lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 27 | |
| 22 | Replace the rear fog lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 27 | |
| 23 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement . Did you complete the replacement? | Go to Step 27 | |
| 24 | Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 27 | |
| 25 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 27 | |
| 26 | Replace the inoperative rear fog lamp bulb. Refer to Tail Lamp, Turn Signal Lamp, High Mount Stop Lamp, License Lamp, Backup Lamp Replacement - Rear . Did you complete the replacement? | Go to Step 27 | |
| 27 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Fog Lamps Inoperative - Rear
Hazard Lamps Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Install a scan tool. Turn ON the ignition, with the engine OFF. Place the hazard switch in the OFF position. Observe the Hazard Lamp Switch parameter in the Instrument panel module (IPM) Inputs data list. Does the Hazard Lamp Switch parameter indicate INACTIVE? | Go to Step 5 | Go to Step 3 |
| 3 | Turn OFF the ignition. Disconnect the hazard switch harness connector. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Hazard Lamp Switch parameter. Does the Hazard Lamp Switch parameter indicate INACTIVE? | Go to Step 6 | Go to Step 4 |
| 4 | Test the hazard switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 7 |
| 5 | Test the hazard switch supply voltage circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 8 |
| 6 | Inspect for poor connections at the harness connector of the hazard switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 9 |
| 7 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 11 |
| 8 | Inspect for poor connections at the harness connector of the rear integration module (RIM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
| 9 | Replace the hazard switch. Refer to Instrument Panel (I/P) Dimmer Switch Replacement . Did you complete the replacement? | Go to Step 12 | |
| 10 | Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 12 | |
| 11 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 12 | |
| 12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Hazard Lamps Always On
Hazard Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the turn signal lamps and indicators operate properly? | Go to Step 3 | Go to Turn Signal Lamps and/or Indicators Inoperative |
| 3 | Install a scan tool. Turn ON the ignition, with the engine OFF. Observe the Hazard Lamp Switch parameter in the instrument panel module (IPM) inputs data list. Turn the hazard switch ON and OFF several times. Does the Hazard Lamp Switch parameter change from INACTIVE to ACTIVE as the hazard switch is cycled? | Go to Step 4 | Go to Step 5 |
| 4 | Test the hazard switch supply voltage circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 10 |
| 5 | Turn OFF the ignition. Disconnect the hazard switch harness connector. Connect a 3-amp fused jumper wire between the hazard switch signal circuit at the hazard switch harness connector and the ground circuit of the hazard switch harness connector. Turn ON the ignition with the engine OFF. Observer the Hazard Lamp Switch parameter in the IPM inputs data list. Does the Hazard Lamp Switch parameter display ACTIVE? | Go to Step 9 | Go to Step 6 |
| 6 | Test the hazard switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 7 |
| 7 | Test the hazard switch signal circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 8 |
| 8 | Inspect for poor connections at the C1 harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 11 |
| 9 | Inspect for poor connections at the harness connector of the hazard switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 13 |
| 10 | Inspect for poor connections at the harness connector of the rear integration module (RIM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 12 |
| 11 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 14 | |
| 12 | Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 14 | |
| 13 | Replace the hazard switch assembly. Refer to Instrument Panel (I/P) Dimmer Switch Replacement . Did you complete the replacement? | Go to Step 14 | |
| 14 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Hazard Lamps Inoperative
Headlamps Always On - Low or High Beam (Standard)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics and Wiper/Washer System Schematics in Wipers/Washer Systems Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Install a scan tool. Turn ON the ignition, with the engine OFF. Turn the headlamp switch to the OFF position. With a scan tool, observe the Headlamp Switch parameter in the instrument panel module (IPM) inputs data list. Does the scan tool indicate the Headlamp Switch parameter is OFF? | Go to Step 3 | Go to Step 12 |
| 3 | With a scan tool, observe both the Low Beam and High Beam Relay parameters in the IPM outputs data list. Does the scan tool indicate the Low Beam and High Beam Relay output parameters are OFF? | Go to Step 7 | Go to Step 4 |
| 4 | With a scan tool, observe the Lights On With Wipers parameter in the IPM inputs data list. Does the scan tool indicate OFF? | Go to Step 5 | Go to Step 13 |
| 5 | With the scan tool, observe the Flash to Pass Switch parameter in the IPM inputs data list. Does the scan tool indicate that the Flash to Pass Switch parameter is INACTIVE? | Go to Step 6 | Go to Step 14 |
| 6 | With a scan tool, observe the Twilight Enable status in the IPM exterior lamps data list. Does the scan tool indicate that the Twilight Enable is DISABLED? | Go to Step 22 | Go to Twilight Sentinel Inoperative |
| 7 | Are the high beam headlamps ON? | Go to Step 10 | Go to Step 8 |
| 8 | Turn OFF the ignition. Disconnect the headlamp low beam relay. Turn ON the ignition, with the engine OFF. Do the low beam headlamps turn OFF? | Go to Step 9 | Go to Step 23 |
| 9 | Turn OFF the ignition. Turn OFF the headlamp switch. Connect a test lamp between the low beam relay coil side supply voltage circuit and the headlamp low beam relay control circuit. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 15 | Go to Step 19 |
| 10 | Turn OFF the ignition. Disconnect the headlamp high beam relay. Turn ON the ignition, with the engine OFF. Do the high beam headlamps turn OFF? | Go to Step 11 | Go to Step 24 |
| 11 | Turn OFF the ignition. Turn OFF the headlamp switch. Connect a test lamp between the coil side supply voltage circuit of the headlamp high beam relay and the headlamp high beam relay control circuit. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 16 | Go to Step 20 |
| 12 | Turn OFF the ignition. Disconnect the turn signal/multifunction switch. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Head Lamp Switch parameter in the IPM inputs data list. Does the scan tool indicate that the Head Lamp Switch parameter is OFF? | Go to Step 21 | Go to Step 17 |
| 13 | Test the windshield wiper switch ON signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 22 |
| 14 | Turn OFF the ignition. Disconnect the turn signal/multifunction switch. With a scan tool, observe the Flash to Pass Switch parameter in the IPM inputs data list. Does the scan tool indicate that the Flash to Pass Switch is INACTIVE? | Go to Step 21 | Go to Step 18 |
| 15 | Locate and repair a short to ground in the headlamp low beam relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 22 |
| 16 | Locate and repair a short to ground in the headlamp high beam relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 22 |
| 17 | Locate and repair a short to ground in the headlamp switch headlamp ON signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 22 |
| 18 | Test the flash to pass switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 22 |
| 19 | Inspect for poor connections at the low beam relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 25 |
| 20 | Inspect for poor connections at the high beam relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 26 |
| 21 | Inspect for poor connections at the harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 27 |
| 22 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 28 |
| 23 | Locate and repair a short to voltage in the headlamp low beam supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 29 | |
| 24 | Locate and repair a short to voltage in the headlamp high beam supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 29 | |
| 25 | Replace the headlamp low beam relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 29 | |
| 26 | Replace the headlamp high beam relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 29 | |
| 27 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 29 | |
| 28 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 29 | |
| 29 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Headlamps Always On - Low or High Beam (Standard)
Headlamps Always On - Low or High Beam (with Intellibeam)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics and Inside Rearview Mirror Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Turn OFF the ignition. Disconnect the inside rearview mirror (ISRVM) harness connector. Refer to Rearview Mirror Replacement (UE1) or Rearview Mirror Replacement (DD7, DD8) in Stationary Windows. Turn ON the ignition, with the engine OFF. Do the high beam headlamps turn OFF? | Go to Step 3 | Go to Step 5 |
| 3 | Turn OFF the ignition. Connect a test lamp between the headlamp high beam relay control circuit and battery voltage at the ISRVM harness connector. Turn ON the ignition, with the engine OFF. Place the headlamp switch in the low beam position. Does the test lamp illuminate? | Go to Step 4 | Go to Step 7 |
| 4 | Locate and repair a short to ground in the headlamp high beam relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 9 |
| 5 | Turn OFF the ignition. Disconnect the automatic headlamp dimming relay. Turn ON the ignition, with the engine OFF. Do the high beam headlamps turn OFF? | Go to Step 6 | Go to Step 10 |
| 6 | Test the automatic high beam PWM signal circuit for a short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 8 |
| 7 | Inspect for poor connections at the harness connector of the ISRVM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 11 |
| 8 | Inspect for poor connections at the harness connector of the automatic headlamp dimming relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 12 |
| 9 | Inspect for poor connections at the harness connector of the instrument panel module (IPM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 13 |
| 10 | Locate and repair a short to battery voltage in the headlamp high beam voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | |
| 11 | Replace the ISRVM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 14 | |
| 12 | Replace the automatic headlamp dimming relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 14 | |
| 13 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 14 | |
| 14 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Headlamps Always On - Low or High Beam (with Intellibeam)
Headlamps Inoperative - High Beams (Standard)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Are both high beam headlamps inoperative? | Go to Step 3 | Go to Step 8 |
| 3 | Install a scan tool. Turn ON the ignition, with the engine OFF. Turn ON the high beam headlamps. With the scan tool, observe the High Beam Select Switch parameter in the instrument panel module (IPM) Inputs data list. Does the data parameter display ACTIVE? | Go to Step 5 | Go to Step 4 |
| 4 | Turn OFF the ignition. Disconnect the turn signal/multifunction switch C4 harness connector. Connect a 3-amp fused jumper between the headlamp high beam switch signal circuit and the ground circuit at the turn signal/multifunction switch C4 harness connector. Turn ON the ignition, with the engine OFF. With the scan tool, observe the High Beam Select Switch parameter in the IPM inputs data list. Does the High Beam Select Switch parameter display ACTIVE? | Go to Step 13 | Go to Step 11 |
| 5 | Turn OFF the ignition. Disconnect the headlamp HIGH BEAM relay located in the underhood fuse block. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Connect a test lamp between the headlamp high beam relay control side supply voltage circuit and the headlamp high beam relay control circuit. Turn ON the ignition, with the engine OFF. Turn ON the high beam headlamps. Does the test lamp illuminate? | Go to Step 6 | Go to Step 10 |
| 6 | Connect a test lamp between the headlamp high beam relay switch side supply voltage circuit and a ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 18 |
| 7 | Turn OFF the ignition. Connect a 40-amp fused jumper between the headlamp high beam relay switch side supply voltage circuit and the headlamp high beam supply voltage circuit. Turn ON the ignition, with the engine OFF. Do both of the high beam headlamps illuminate? | Go to Step 14 | Go to Step 8 |
| 8 | Disconnect the inoperative high beam headlamp bulb. Connect a test lamp between the high beam headlamp supply voltage circuit at the inoperative high beam headlamp bulb and the ground circuit of the inoperative high beam headlamp bulb. Does the test lamp illuminate? | Go to Step 16 | Go to Step 9 |
| 9 | Test the headlamp high beam supply voltage circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 17 |
| 10 | Test the headlamp high beam relay control circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 15 |
| 11 | Test the turn signal/multifunction switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 12 |
| 12 | Test the headlamp high beam switch signal circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 15 |
| 13 | Inspect for poor connections at the C4 harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 19 |
| 14 | Inspect for poor connections at the headlamp high beam relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 20 |
| 15 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 21 |
| 16 | Inspect for poor connections at the harness connector of the inoperative high beam headlamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 22 |
| 17 | Locate and repair an open or high resistance in the headlamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 23 | |
| 18 | Locate and repair an open or high resistance in the switch side supply voltage circuit of the headlamp high beam relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 23 | |
| 19 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 23 | |
| 20 | Replace the headlamp high beam relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 23 | |
| 21 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 23 | |
| 22 | Replace the inoperative high beam headlamp bulb. Refer to Bulb, Cover Replacement - Headlamp . Did you complete the replacement? | Go to Step 23 | |
| 23 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Headlamps Inoperative - High Beams (Standard)
Headlamps Inoperative - High Beams (with Intellibeam)
| Step | Action | Value | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics and Inside Rearview Mirror Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | Does the intellibeam indicator located on the inside rearview mirror (ISRVM) flash more than 3 times? | Go to Step 18 | Go to Step 3 | |
| 3 | Perform the Intellibeam Demonstration Mode. Refer to Exterior Lighting Systems Description and Operation . Does the intellibeam demonstration mode operate as described? | Go to Step 7 | Go to Step 4 | |
| 4 | Did the high beam headlamps fade from full intensity to low intensity 3 times during the demonstration mode? | Go to Step 5 | Go to Step 12 | |
| 5 | Did the intellibeam light sensor operate as described during the demonstration mode? | Go to Step 6 | Go to Step 18 | |
| 6 | Did the intellibeam ON/OFF switch operate as described during the demonstration mode? | Go to Step 7 | Go to Step 18 | |
| 7 | Turn OFF the ignition. Disconnect the ISRVM harness connector. Refer to Rearview Mirror Replacement (UE1) or Rearview Mirror Replacement (DD7, DD8) in Stationary Windows. Connect a test lamp between the headlamp high beam relay control circuit and battery voltage. Turn ON the ignition, with the engine OFF. Place the headlamps switch in the AUTO position. Place the headlamp dimmer switch in the high beam position. Does the test lamp illuminate? | Go to Step 9 | Go to Step 8 | |
| 8 | Locate and repair an open or short to battery voltage in the headlamp high beam relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Headlamps Inoperative - High Beams (Standard) or Headlamps Inoperative - High Beams (with Intellibeam) | |
| 9 | Turn OFF the ignition. Cover the sunload sensor located in the middle of the upper dash with a dark cloth. Connect a test lamp between the headlamp automatic high beam DIM enable circuit at the ISRVM harness connector and battery voltage. Turn ON the ignition, with the engine OFF. Place the headlamp switch in the AUTO position. Does the test lamp illuminate? | Go to Step 11 | Go to Step 10 | |
| 10 | Locate and repair an open or short the battery voltage in the headlamp automatic high beam DIM enable circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 20 | |
| 11 | Test the vehicle speed signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 18 | |
| 12 | Turn OFF the ignition. Disconnect the automatic headlamp dimming relay. Refer to Rearview Mirror Replacement (UE1) or Rearview Mirror Replacement (DD7, DD8) in Stationary Windows. Connect a 15-amp fused jumper between the automatic headlamp dimming relay voltage supply circuit and the headlamp high beam voltage supply circuit. Do the high beam headlamps illuminate? | Go to Step 13 | Go to Step 16 | |
| 13 | Test the automatic headlamp dimming relay ground circuit for an open or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 14 | |
| 14 | Test the automatic high beam PWM signal circuit for an open or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 15 | |
| 15 | Turn OFF the ignition. Install the automatic headlamp dimming relay. Turn ON the ignition, with the engine OFF. Place the headlamp switch in the AUTO position. Place the headlamp dimmer switch is in the high beam position. With a DMM, measure the voltage of the automatic high beam PWM signal circuit at the automatic headlamp dimming relay terminals. Does the voltage measure less than the specified value? | 2 V | Go to Step 19 | Go to Step 18 |
| 16 | Locate and repair an open, high resistance, or short to ground in the headlamp high beam voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 17 | |
| 17 | Locate and repair an open or high resistance in the headlamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 21 | |
| 18 | Inspect for poor connections at the harness connector of the ISRVM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 22 | |
| 19 | Inspect for poor connections at the harness connector of the automatic headlamp dimming relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 23 | |
| 20 | Inspect for poor connections at the harness connector of the instrument panel module (IPM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 24 | |
| 21 | Inspect for poor connections at the harness connector of the inoperative high beam headlamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 25 | |
| 22 | Replace the ISRVM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 26 | ||
| 23 | Replace the automatic headlamp dimming relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 26 | ||
| 24 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 26 | ||
| 25 | Replace the inoperative high beam headlamp bulb. Refer to Bulb, Cover Replacement - Headlamp . Did you complete the replacement? | Go to Step 26 | ||
| 26 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 | |
Headlamps Inoperative - High Beams (with Intellibeam)
Headlamps Inoperative - Low Beams (Standard Headlamps)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Are both low beam headlamps inoperative? | Go to Step 3 | Go to Step 8 |
| 3 | Install a scan tool. Turn ON the ignition, with the engine OFF. Turn ON the headlamps. With the scan tool, observe the Headlamp Switch parameter in the instrument panel module (IPM) Inputs data list. Does the data parameter display ON? | Go to Step 5 | Go to Step 4 |
| 4 | Turn OFF the ignition. Disconnect the turn signal/multifunction switch C3 harness connector. Connect a 3-amp fused jumper between the headlamp ON signal circuit and the ground circuit of the turn signal/multifunction switch at the C3 harness connector. Turn ON the ignition, with the engine OFF. With the scan tool, observe the Headlamp Switch parameter in the IPM inputs data list. Does the Headlamp Switch parameter display ON? | Go to Step 14 | Go to Step 11 |
| 5 | Turn OFF the ignition. Disconnect the headlamp LOW BEAM relay located in the underhood fuse block. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Connect a test lamp between the headlamp low beam relay control side supply voltage circuit and the headlamp low beam relay control circuit. Turn ON the ignition, with the engine OFF. Turn ON the low beam headlamps. Does the test lamp illuminate? | Go to Step 6 | Go to Step 10 |
| 6 | Connect a test lamp between the headlamp low beam relay switch side supply voltage circuit and ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 19 |
| 7 | Turn OFF the ignition. Connect a 40-amp fused jumper between the headlamp low beam relay switch side supply voltage circuit and the headlamp low beam supply voltage circuit. Turn ON the ignition, with the engine OFF. Do both of the low beam headlamps illuminate? | Go to Step 15 | Go to Step 8 |
| 8 | Disconnect the inoperative low beam headlamp bulb. Connect a test lamp between the low beam headlamp supply voltage circuit at the inoperative low beam headlamp bulb and the ground circuit of the inoperative low beam headlamp bulb. Does the test lamp illuminate? | Go to Step 17 | Go to Step 9 |
| 9 | Test the headlamp low beam supply voltage circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 18 |
| 10 | Test the headlamp low beam relay control circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 13 |
| 11 | Test the turn signal/multifunction switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 12 |
| 12 | Test the turn signal/multifunction switch headlamp ON signal circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 13 |
| 13 | Test the twilight sentinel delay signal circuit of the IPM for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 16 |
| 14 | Inspect for poor connections at the C 3 harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 20 |
| 15 | Inspect for poor connections at the headlamp low beam relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 21 |
| 16 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 22 |
| 17 | Inspect for poor connections at the harness connector of the inoperative low beam headlamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 23 |
| 18 | Locate and repair an open or high resistance in the headlamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | |
| 19 | Locate and repair an open or high resistance in the switch side supply voltage circuit of the headlamp low beam relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | |
| 20 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 24 | |
| 21 | Replace the headlamp low beam relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 24 | |
| 22 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 24 | |
| 23 | Replace the inoperative low beam headlamp bulb. Refer to Bulb, Cover Replacement - Headlamp . Did you complete the replacement? | Go to Step 24 | |
| 24 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Headlamps Inoperative - Low Beams (Standard Headlamps)
Headlamps Inoperative - Low Beams (HID Headlamps)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Are both low beam headlamps inoperative? | Go to Step 3 | Go to Step 8 |
| 3 | Install a scan tool. Turn ON the ignition, with the engine OFF. Turn ON the headlamps. With the scan tool, observe the Headlamp Switch parameter in the instrument panel module (IPM) Inputs data list. Does the data parameter display ON? | Go to Step 5 | Go to Step 4 |
| 4 | Turn OFF the ignition. Disconnect the turn signal/multifunction switch C3 harness connector. Connect a 3-amp fused jumper between the headlamp ON signal circuit and the ground circuit of the turn signal/multifunction switch at the C3 harness connector. Turn ON the ignition, with the engine OFF. With the scan tool, observe the Headlamp Switch parameter in the IPM inputs data list. Does the Headlamp Switch parameter display ON? | Go to Step 14 | Go to Step 11 |
| 5 | Turn OFF the ignition. Disconnect the headlamp LOW BEAM relay located in the underhood fuse block. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Connect a test lamp between the headlamp low beam relay control side supply voltage circuit and the headlamp low beam relay control circuit. Turn ON the ignition, with the engine OFF. Turn ON the low beam headlamps. Does the test lamp illuminate? | Go to Step 6 | Go to Step 10 |
| 6 | Connect a test lamp between the headlamp low beam relay switch side supply voltage circuit and ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 19 |
| 7 | Turn OFF the ignition. Connect a 40-amp fused jumper between the headlamp low beam relay switch side supply voltage circuit and the headlamp low beam supply voltage circuit. Turn ON the ignition, with the engine OFF. Do both of the low beam headlamps illuminate? | Go to Step 15 | Go to Step 8 |
| 8 | Disconnect the inoperative low beam headlamp. Connect a test lamp between the low beam headlamp supply voltage circuit at the inoperative low beam headlamp and the ground circuit of the inoperative low beam headlamp. Does the test lamp illuminate? | Go to Step 17 | Go to Step 9 |
| 9 | Test the headlamp low beam supply voltage circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 18 |
| 10 | Test the headlamp low beam relay control circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 13 |
| 11 | Test the turn signal/multifunction switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 12 |
| 12 | Test the turn signal/multifunction switch headlamp ON signal circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 13 |
| 13 | Test the twilight sentinel delay signal circuit of the IPM for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 16 |
| 14 | Inspect for poor connections at the C3 harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 20 |
| 15 | Inspect for poor connections at the headlamp low beam relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 21 |
| 16 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 22 |
| 17 | Inspect for poor connections at the harness connector of the inoperative low beam high intensity discharge (HID) headlamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 23 |
| 18 | Locate and repair an open or high resistance in the headlamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 25 | |
| 19 | Locate and repair an open or high resistance in the switch side supply voltage circuit of the headlamp low beam relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 25 | |
| 20 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 25 | |
| 21 | Replace the headlamp low beam relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 25 | |
| 22 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 25 | |
| 23 | Replace the inoperative HID headlamp arc tube. Refer to Ballast, Bulb, Cover Replacement - HID Headlamp . Do the low beam headlamps operate properly? | Go to Step 25 | Go to Step 24 |
| 24 | Replace the inoperative HID headlamp ballast. Refer to Ballast, Bulb, Cover Replacement - HID Headlamp . Did you complete the replacement? | Go to Step 25 | |
| 25 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Headlamps Inoperative - Low Beams (HID Headlamps)
Headlamps Inoperative - Flash to Pass
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the high beam headlamps operate properly? | Go to Step 3 | Go to Headlamps Inoperative - High Beams (Standard) or Headlamps Inoperative - High Beams (with Intellibeam) |
| 3 | Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Flash to Pass Switch parameter in the instrument panel module (IPM) inputs list. Turn the flash to pass switch ON and OFF several times. Does the Flash to Pass Switch parameter change from ACTIVE to INACTIVE as the switch is cycled? | Go to Step 8 | Go to Step 4 |
| 4 | Turn OFF the ignition. Disconnect the C4 harness connector at the turn signal/multifunction switch. Connect a 3-amp fused jumper wire between the flash to pass switch signal circuit and ground circuit at the turn signal/multifunction switch C4 harness connector. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Flash to Pass Switch parameter in the IPM inputs list. Does the scan tool indicate the Flash to Pass Switch parameter is ACTIVE? | Go to Step 7 | Go to Step 5 |
| 5 | Locate and repair an open or high resistance in the flash to pass switch ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 6 |
| 6 | Locate and repair an open, high resistance, or short to voltage in the flash to pass switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 8 |
| 7 | Inspect for poor connections at the harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 |
| 8 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 |
| 9 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 11 | |
| 10 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming Did you complete the replacement? | Go to Step 11 | |
| 11 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Headlamps Inoperative - Flash to Pass
High Beam Indicator Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the high and low beam headlamps operate properly? | Go to Step 3 | Go to Headlamps Always On - Low or High Beam (Standard) or Headlamps Always On - Low or High Beam (with Intellibeam) |
| 3 | Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 5 | |
| 5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
High Beam Indicator Always On
High Beam Indicator Inoperative (Standard)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the high beam headlamps operate properly? | Go to Step 3 | Go to Headlamps Inoperative - High Beams (Standard) or Headlamps Inoperative - High Beams (with Intellibeam) |
| 3 | Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 5 | |
| 5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
High Beam Indicator Inoperative (Standard)
High Beam Indicator Inoperative (with Intellibeam)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the high beam headlamps operate properly? | Go to Step 3 | Go to Headlamps Inoperative - High Beams (Standard) or Headlamps Inoperative - High Beams (with Intellibeam) |
| 3 | Does the high beam indicator located on the instrument panel cluster (IPC) illuminate when the headlamp dimmer switch is cycled to the high beam position? | Go to Step 4 | Go to Step 6 |
| 4 | Test the headlamp automatic high beam DIM status circuit for an open, high resistance, or short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 5 |
| 5 | Inspect for poor connections at the harness connector of the inside rearview mirror (ISRVM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 8 |
| 6 | Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 7 |
| 7 | Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 9 | |
| 8 | Replace the ISRVM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 9 | |
| 9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
High Beam Indicator Inoperative (with Intellibeam)
Illuminated Entry Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Open all doors. Observe each door courtesy lamp located on the bottom of the interior door trim. Do the door courtesy lamps operate properly for all doors? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Do the interior courtesy lamps operate properly? | Go to Step 4 | Go to Courtesy Lamps Inoperative |
| 4 | Is the inoperative door courtesy lamp located on one of the front doors? | Go to Step 5 | Go to Step 6 |
| 5 | Install a scan tool. Turn ON the ignition, with the engine OFF. Open the door with the inoperative courtesy lamp. With a scan tool, observe the Exterior Courtesy Lamp Status parameter in the door control module data display list associated with the inoperative door courtesy lamp. Does the scan tool indicate the Exterior Courtesy Lamp Status parameter is ON? | Go to Step 7 | Go to Step 9 |
| 6 | Turn OFF the ignition. Disconnect the inoperative door courtesy lamp. Connect a test lamp between the door courtesy lamp voltage supply circuit and ground. Turn ON the ignition, with the engine OFF. Make sure the door is open. Does the test lamp illuminate? | Go to Step 10 | Go to Step 11 |
| 7 | Test the courtesy lamp control high circuit for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 8 |
| 8 | Test the courtesy lamp control low circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 9 |
| 9 | Inspect for poor connections at the C2 harness connector of the door control module associated with the inoperative door courtesy lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 12 |
| 10 | Locate and repair an open or high resistance in the inoperative door courtesy lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | |
| 11 | Locate and repair an open or high resistance in the inoperative door courtesy lamp voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | |
| 12 | Replace the inoperative door control module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the repair? | Go to Step 13 | |
| 13 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Illuminated Entry Lamps Inoperative
Interior Backlighting Does Not Dim
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Dimming Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Are all of the interior backlighting lamps always ON? | Go to Step 3 | Go to Step 8 |
| 3 | Install a scan tool. With a scan tool, observe the Dimming Pot A/D parameter in the IPM inputs data list. Move the instrument panel (I/P) dimmer switch from minimum to maximum. Does the scan tool indicate that the Dimming Pot A/D parameter is changing when the I/P dimmer switch is moved? | Go to Step 4 | Go to Step 6 |
| 4 | With a scan tool, observe the Park Lamp Switch status in the IPM inputs data list. Does the scan tool display ON? | Go to Step 5 | Go to Step 7 |
| 5 | With a scan tool, observe the Ambient Light Status parameter in the lighting data list. Does the scan tool display DARK? | Go to Step 10 | Go to Twilight Sentinel Inoperative |
| 6 | Test the I/P dimmer switch low reference circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 9 |
| 7 | Test the park lamp relay control circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 10 |
| 8 | Inspect for poor connections at the harness connector of the appropriate control module of the inoperative backlight lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 11 |
| 9 | Inspect for poor connections at the harness connector of the I/P dimmer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 12 |
| 10 | Inspect for poor connections at the harness connector of the instrument panel module (IPM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 13 |
| 11 | Replace the appropriate control module for the inoperative backlight lamp. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 14 | |
| 12 | Replace the I/P lamps dimmer switch. Refer to Instrument Panel (I/P) Dimmer Switch Replacement . Did you complete the replacement? | Go to Step 14 | |
| 13 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 14 | |
| 14 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Interior Backlighting Does Not Dim
Interior Backlighting Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Dimming Schematics Connector End View Reference: Master Electrical Component List | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the park lamps operate properly? | Go to Step 3 | Go to Park Lamps Inoperative |
| 3 | Are all of the interior backlighting lamps inoperative? | Go to Step 8 | Go to Step 4 |
| 4 | Turn OFF the ignition. Disconnect the component with the inoperative backlight lamp. Connect a test lamp between the backlight lamp control circuit of the component with the inoperative backlight lamp and the ground circuit of the component with the inoperative backlight lamp. Turn ON the ignition, with the engine OFF. Cover the sunload sensor. Place the headlamp switch in the PARK position. Operate the instrument panel (I/P) dimmer switch from minimum to maximum. Does the test lamp illuminate? | Go to Step 9 | Go to Step 5 |
| 5 | Test the backlight lamps control circuit of the inoperative backlight lamp for the following: An open A high resistance A short to ground Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 6 |
| 6 | Test the ground circuit of the inoperative backlight lamp for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 7 |
| 7 | Inspect for poor connections at the harness connector of the appropriate control module for the inoperative backlight lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 12 |
| 8 | Inspect for poor connections at the harness connector of the instrument panel module (IPM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 11 |
| 9 | Inspect for poor connections at the harness connector of the component with inoperative backlight lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 10 |
| 10 | Replace the inoperative backlight bulbs in the component if they are replaceable. See the appropriate systems operation and description. If the bulb is not replaceable replace the component with the inoperative backlight lamps. Did you complete the replacement? | Go to Step 13 | |
| 11 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 13 | |
| 12 | Replace the appropriate control module for the inoperative backlight lamp. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 13 | |
| 13 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Interior Backlighting Inoperative
Instrument Panel (I/P) Compartment Lamp Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Cover the sunload sensor assembly. Turn ON the courtesy lamps. Push and release the instrument panel (I/P) compartment lamp switch. Does the I/P compartment lamp operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Do the courtesy lamps operate properly? | Go to Step 4 | Go to Symptoms - Lighting Systems |
| 4 | Turn OFF the ignition. Disconnect the I/P compartment lamp switch harness connector. Connect a test lamp between the I/P compartment lamp switch voltage supply circuit and ground. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 5 | Go to Step 7 |
| 5 | Turn OFF the ignition. Connect a test lamp between the I/P compartment lamp switch voltage supply circuit and the I/P compartment lamp switch ground circuit at the I/P compartment lamp switch harness connector. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 6 | Go to Step 8 |
| 6 | Inspect for poor connections at the harness connector of the I/P compartment lamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 9 |
| 7 | Locate and repair the following in the I/P compartment lamp voltage supply circuit: An open A high resistance A short to ground Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 10 | |
| 8 | Locate and repair and open or high resistance in the I/P compartment lamp switch ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 10 | |
| 9 | Replace the I/P compartment lamp switch. Refer to Compartment Replacement - Instrument Panel (I/P) in Instrument Panel. Gages, and Console. Did you complete the replacement? | Go to Step 10 | |
| 10 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Instrument Panel (I/P) Compartment Lamp Inoperative
License Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the park lamps operate properly? | Go to Step 3 | Go to Park Lamps Inoperative |
| 3 | Turn OFF the ignition. Remove the inoperative license lamp bulb. Connect a test lamp between the inoperative license lamp supply voltage circuit and the ground circuit of the inoperative license lamp. Turn ON the ignition, with the engine OFF. Turn ON the park lamps. Does the test lamp illuminate? | Go to Step 5 | Go to Step 4 |
| 4 | Test the inoperative license lamp supply voltage circuit for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 6 |
| 5 | Inspect for poor connections at the inoperative license lamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 7 |
| 6 | Locate and repair an open or high resistance in the ground circuit of the license lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 8 | |
| 7 | Replace the inoperative license lamp bulb. Refer to Tail Lamp, Turn Signal Lamp, High Mount Stop Lamp, License Lamp, Backup Lamp Replacement - Rear . Did you complete the replacement? | Go to Step 8 | |
| 8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
License Lamps Inoperative
Lights On Indicator Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the park lamps operate properly? | Go to Step 3 | Go to Park Lamps Inoperative |
| 3 | Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the repair? | Go to Step 5 | |
| 5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Lights On Indicator Always On
Lights On Indicator Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the park lamps operate properly? | Go to Step 3 | Go to Park Lamps Inoperative |
| 3 | Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the repair? | Go to Step 5 | |
| 5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Lights On Indicator Inoperative
Park Lamps Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Install a scan tool. Turn ON the ignition, with engine OFF. Place the headlamp switch in the OFF position. With the scan tool, observe the Park Lamp Switch parameter in the instrument panel module (IPM) inputs data list. Does the Park Lamp Switch data parameter display OFF? | Go to Step 4 | Go to Step 3 |
| 3 | Turn OFF the ignition. Disconnect the C3 harness connector at the turn signal/multifunction switch. Turn ON the ignition, with the engine OFF. With the scan tool, observe the Park Lamp Switch parameter in the IPM inputs data list. Does the Park Lamp Switch data parameter display OFF? | Go to Step 8 | Go to Step 7 |
| 4 | Turn OFF the ignition. Disconnect the park lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Turn ON the ignition, with the engine OFF. Do the park lamps turn OFF? | Go to Step 5 | Go to Step 11 |
| 5 | Turn OFF the ignition. Connect a test lamp between the park lamp relay control circuit and the park lamp relay coil side supply voltage circuit at the underhood fuse block. Turn ON the ignition, with the engine OFF. Turn the park lamps ON. Does the test lamp illuminate? | Go to Step 9 | Go to Step 6 |
| 6 | Test the park lamp relay control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 10 |
| 7 | Test the park lamp switch on signal circuit of the turn signal/multifunction switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 10 |
| 8 | Inspect for poor connections at the harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 14 |
| 9 | Inspect for poor connections at the park lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 15 |
| 10 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 16 |
| 11 | Locate and repair a short to voltage in the park lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 12 |
| 12 | Inspect for poor connections at the harness connector of the underhood fuse block. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 13 |
| 13 | Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 17 | |
| 14 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 17 | |
| 15 | Replace the park lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 17 | |
| 16 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 17 | |
| 17 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Park Lamps Always On
Park Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Install a scan tool. Turn ON the ignition, with engine OFF. Place the headlamp switch in the PARK position. With the scan tool, observe the Park Lamp Switch parameter in the instrument panel module (IPM) inputs data list. Does the Park Lamp Switch data parameter display ON? | Go to Step 4 | Go to Step 3 |
| 3 | Turn OFF the ignition. Disconnect the C3 harness connector at the turn signal/multifunction switch. Connect a 3-amp fused jumper wire between the park lamp switch ON signal circuit and the turn signal/multifunction switch ground circuit at the turn signal/multifunction switch C3 harness connector. Turn ON the ignition, with the engine OFF. With the scan tool, observe the Park Lamp Switch parameter in the IPM inputs data list. Does the Park Lamp Switch data parameter display ON? | Go to Step 10 | Go to Step 6 |
| 4 | Turn OFF the ignition. Disconnect the park lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Connect a test lamp between the park lamp relay control circuit and the park lamp relay coil side supply voltage circuit at the underhood fuse block. Turn ON the ignition, with the engine OFF. Turn the park lamps ON. Does the test lamp illuminate? | Go to Step 8 | Go to Step 5 |
| 5 | Test the park lamp relay control circuit for the following: An open A high resistance A short to voltage Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 12 |
| 6 | Locate and repair an open or high resistance in the turn signal/multifunction switch ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 7 |
| 7 | Locate and repair the following in the park lamp switch ON signal circuit: An open A high resistance A short to voltage Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 12 |
| 8 | Turn OFF the ignition. Connect a 30-amp fused jumper between the park lamp relay switch side supply voltage circuit and the park lamp supply voltage circuit. Turn ON the ignition, with the engine OFF. Do all of the park lamps illuminate? | Go to Step 11 | Go to Step 9 |
| 9 | Locate and repair on open or high resistance in the inoperative park lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 13 |
| 10 | Inspect for poor connections at the harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 14 |
| 11 | Inspect for poor connections at the park lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 15 |
| 12 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 16 |
| 13 | Locate and repair on open or high resistance in the inoperative park lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | |
| 14 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 17 | |
| 15 | Replace the park lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 17 | |
| 16 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 17 | |
| 17 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Park Lamps Inoperative
Reading Lamp(s) Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Does the courtesy lamp function of the inoperative overhead courtesy/reading lamp operate properly? | Go to Step 3 | Go to Courtesy Lamps Inoperative |
| 3 | Test the ground circuit of the inoperative overhead reading lamp for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 4 |
| 4 | Inspect for poor connections at the harness connector of the inoperative overhead courtesy/reading lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 5 |
| 5 | Replace the inoperative overhead courtesy/reading lamp. Refer to Courtesy Lamp Replacement - Overhead Console (FRONT) or Courtesy Lamp Replacement - Overhead Console (REAR) . Did you complete the replacement? | Go to Step 6 | |
| 6 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Reading Lamp(s) Inoperative
Rear Compartment Lamp(s) Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Test the rear compartment lamp controlled ground circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 5 | Go to Step 3 |
| 3 | Inspect for poor connections at the harness connector of the rear compartment lid release actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the rear compartment lid release actuator. Refer to Trim, Lid, Latch, Strut, Hinge Replacement - Rear Compartment in Body Rear End. Did you complete the replacement? | Go to Step 5 | |
| 5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Rear Compartment Lamp(s) Always On
Rear Compartment Lamp(s) Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Turn ON the ignition, with the engine OFF. Press the trunk release switch. Does the deck lid open? | Go to Step 3 | Go to Trunk Release Inoperative (Interior Release Inoperative ) or Trunk Release Inoperative (Exterior Release Inoperative) in Body Rear End |
| 3 | Do the courtesy lamps operate properly? | Go to Step 4 | Go to Symptoms - Lighting Systems |
| 4 | Turn OFF the ignition. Disconnect the rear compartment lamp. Turn ON the ignition, with the engine OFF. Connect a test lamp between the courtesy lamp supply voltage circuit of the rear compartment lamp and a good ground. Does the test lamp illuminate? | Go to Step 5 | Go to Step 9 |
| 5 | Connect a test lamp between the courtesy lamp voltage supply circuit of the rear compartment lamp and the rear compartment lamp ground control circuit. Does the test lamp illuminate? | Go to Step 7 | Go to Step 6 |
| 6 | Test for an open or high resistance in the rear compartment lamp control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 8 |
| 7 | Inspect for poor connections at the rear compartment lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
| 8 | Inspect for poor connections at the harness connector of the rear compartment lid release actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 11 |
| 9 | Locate and repair the following in the courtesy lamp voltage supply circuit of the rear compartment lamp: An open A high resistance A short to ground Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 12 | |
| 10 | Replace the rear compartment lamp. Refer to Rear Compartment Lamp Replacement . Did you complete the replacement? | Go to Step 12 | |
| 11 | Replace the rear compartment lid release actuator. Refer to Trim, Lid, Latch, Strut, Hinge Replacement - Rear Compartment in Body Rear End. Did you complete the replacement? | Go to Step 12 | |
| 12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Rear Compartment Lamp(s) Inoperative
Repeater Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the turn signals operate properly? | Go to Step 3 | Go to Turn Signal Lamps and/or Indicators Inoperative |
| 3 | Turn OFF the ignition. Disconnect the inoperative repeater lamp bulb. Connect a test lamp between the turn signal lamp voltage supply circuit of the inoperative repeater lamp and the ground circuit of the inoperative repeater lamp. Turn ON the ignition, with the engine OFF. Place the turn signal switch in the appropriate position. Does the test lamp flash ON and OFF? | Go to Step 5 | Go to Step 4 |
| 4 | Test for an open or high resistance in the front turn signal lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 6 |
| 5 | Inspect for poor connections at the inoperative repeater lamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 7 |
| 6 | Locate and repair an open or high resistance in the ground circuit of the inoperative repeater lamp. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 8 | |
| 7 | Replace the inoperative repeater lamp bulb. Refer to Headlamp, Fog Lamp, Turn Signal Lamp, Side Marker Lamp Replacement - Front . Did you complete the replacement? | Go to Step 8 | |
| 8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Repeater Lamps Inoperative
Diagnostic Aids
| IMPORTANT | The stop lamps will not illuminate unless the ignition is in the ON position. For more detailed information concerning stop lamp operation, refer to Exterior Lighting Systems Description and Operation . |
Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Turn OFF the ignition. Disconnect the stop lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Turn ON the ignition, with the engine OFF. Do the stop lamps turn OFF? | Go to Step 3 | Go to Step 7 |
| 3 | Turn OFF the ignition. Connect a test lamp between the stop lamp switch signal circuit at the coil side of the stop lamp relay and the stop lamp voltage supply circuit at the switch side of the stop lamp relay. Turn ON the ignition, with the engine OFF. Press and release the brake pedal. Does the test lamp turn ON and OFF? | Go to Step 5 | Go to Step 4 |
| 4 | Test the stop lamp switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 6 |
| 5 | Inspect for poor connections at the stop lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 8 |
| 6 | Inspect for poor connections at the harness connector of the instrument panel module (IPM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 9 |
| 7 | Test the stop lamp voltage supply circuit between the tail lamp assembly and the fuse block-right rear for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | |
| 8 | Replace the stop lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 10 | |
| 9 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 10 | |
| 10 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Stop Lamps Always On
| IMPORTANT | The stop lamps will not illuminate unless the ignition is in the ON position. For more detailed information concerning stop lamp operation, refer to Exterior Lighting Systems Description and Operation . |
Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Are all of the stop lamps inoperative? | Go to Step 3 | Go to Step 5 |
| 3 | Turn OFF the ignition. Disconnect the stop lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Connect a test lamp between the stop lamp switch signal circuit at the coil side of the stop lamp relay and ground. Turn ON the ignition, with the engine OFF. Press and release the brake pedal. Does the test lamp illuminate? | Go to Step 4 | Go to Step 9 |
| 4 | Turn OFF the ignition. Connect a 10-amp fused jumper between the stop lamp relay switch side supply voltage and the stop lamp voltage supply circuit at the switch side of the stop lamp relay. Turn ON the ignition, with the engine OFF. Do the stop lamps illuminate? | Go to Step 8 | Go to Step 5 |
| 5 | Test the voltage supply circuit of the inoperative stop lamp for the following: An open A high resistance A short to ground Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 6 |
| 6 | Test the ground circuit of the inoperative stop lamp for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 7 |
| 7 | Inspect for poor connections at the harness connector of the inoperative stop lamp or center high mounted stop lamp (CHMSL). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 13 |
| 8 | Inspect for poor connections at the stop lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 12 |
| 9 | Test the stop lamp switch signal circuit for the following: An open A high resistance A short to ground Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 10 |
| 10 | Inspect for poor connections at the harness connector of the instrument panel module (IPM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 14 | Go to Step 11 |
| 11 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 14 | |
| 12 | Replace the stop lamp relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 14 | |
| 13 | Replace the inoperable stop lamp. Refer to Tail Lamp, Turn Signal Lamp, High Mount Stop Lamp, License Lamp, Backup Lamp Replacement - Rear . Did you complete the replacement? | Go to Step 14 | |
| 14 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Stop Lamps Inoperative
Turn Signal Lamps and/or Indicators Always On or Flashing
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Are only the turn signal indicators in the instrument panel cluster (IPC) always ON or flashing? | Go to Step 10 | Go to Step 3 |
| 3 | Test the appropriate turn signal lamp supply voltage circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 4 |
| 4 | Turn OFF the ignition. Disconnect the C3 harness connector at the instrument panel module (IPM). Connect a test lamp between the appropriate front turn signal switch signal circuit at the IPM harness connector and ground. Does the test lamp illuminate? | Go to Step 5 | Go to Step 6 |
| 5 | Locate and repair a short to voltage in the appropriate front turn signal switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 8 |
| 6 | Disconnect the IPM. Turn ON the ignition, with the engine OFF. Observe the turn signals. Did the turn signals turn OFF? | Go to Step 7 | Go to Step 9 |
| 7 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 13 |
| 8 | Inspect for poor connections at the harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 11 |
| 9 | Inspect for poor connections at the harness connector of the rear integration module (RIM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 14 |
| 10 | Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 12 |
| 11 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 15 | |
| 12 | Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 15 | |
| 13 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 15 | |
| 14 | Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 15 | |
| 15 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Turn Signal Lamps and/or Indicators Always On or Flashing
Turn Signal Lamps and/or Indicators Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Are only the turn signal indicators in the instrument panel cluster (IPC) inoperative? | Go to Step 15 | Go to Step 3 |
| 3 | Is only one turn signal lamp inoperative? | Go to Step 4 | Go to Step 5 |
| 4 | Test the inoperative turn signal lamp supply voltage circuit for the following: An open A high resistance A short to ground Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 16 |
| 5 | Install a scan tool. Turn ON the ignition, with the engine OFF. With the scan tool, observe the RF, RR, LF, and LR Turn/Hazard Lamp Command parameters in the rear integration module (RIM) lighting data list. Operate the turn signal switch from the left turn to right turn positions. Does the scan tool indicate that the RF, RR, LF, and LR Turn/Hazard Lamp Command parameters change state with the turn signal switch? | Go to Step 12 | Go to Step 6 |
| 6 | Turn OFF the ignition. Disconnect the C1 harness connector at the turn signal/multifunction switch. Connect a 3-amp fused jumper between the right front turn signal switch signal circuit and ground. Turn ON the ignition, with the engine OFF. Do the right turn signals operate correctly? | Go to Step 7 | Go to Step 8 |
| 7 | Turn OFF the ignition. Connect a 3-amp fused jumper between the left front turn signal switch signal circuit and ground. Turn ON the ignition, with the engine OFF. Do the left turn signals operate correctly? | Go to Step 9 | Go to Step 8 |
| 8 | Test the turn signal switch supply voltage circuit for the following: An open A high resistance A short to voltage Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 10 |
| 9 | Test the turn signal/multifunction switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 11 |
| 10 | Inspect for poor connections at the C3 harness connector of the instrument panel module (IPM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 19 |
| 11 | Inspect for poor connections at the C1 harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 17 |
| 12 | Test the ground circuits of the turn signal lamps for opens or high resistances. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 13 |
| 13 | Test the supply voltage circuits of the turn signal lamps for opens or high resistances. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 14 |
| 14 | Inspect for poor connections at the harness connector of the RIM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 20 |
| 15 | Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 18 |
| 16 | Locate and repair an open or high resistance in the ground circuit of the inoperative turn signal lamp. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | |
| 17 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 21 | |
| 18 | Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 21 | |
| 19 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 21 | |
| 20 | Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 21 | |
| 21 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Turn Signal Lamps and/or Indicators Inoperative
Twilight Sentinel Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the headlamps and DRL operate properly? | Go to Step 3 | Go to Daytime Running Lamps (DRL) Inoperative (Domestic/Canadian) or Daytime Running Lamps (DRL) Inoperative (Norway/Sweden) or Headlamps Inoperative - Low Beams (Standard Headlamps) or Headlamps Inoperative - Low Beams (HID Headlamps) |
| 3 | Install a scan tool. Turn ON the ignition, with the engine OFF. Place the headlamp switch in the AUTO position. With a scan tool, observe the Twilight Enable parameter in the instrument panel module (IPM) exterior lamps data list. Does the Twilight Enable parameter display ENABLED? | Go to Step 8 | Go to Step 4 |
| 4 | Turn OFF the ignition. Disconnect the turn signal/multifunction switch C3 harness connector. Connect a 3-amp fused jumper between the turn signal/multifunction switch twilight sentinel display signal circuit at the turn signal/multifunction switch C3 harness connector and the ground circuit of the turn signal/multifunction switch at the C3 harness connector. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Twilight Enable parameter in the IPM exterior lamps data list. Does the Twilight Enable parameter display ENABLED? | Go to Step 7 | Go to Step 5 |
| 5 | Test the turn signal/multifunction switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 6 |
| 6 | Test the twilight sentinel display signal circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 8 |
| 7 | Inspect for poor connections at the C3 harness connector of the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 |
| 8 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 |
| 9 | Replace the turn signal/multifunction switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 11 | |
| 10 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 11 | |
| 11 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Twilight Sentinel Inoperative
Vanity Mirror Lamp(s) Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Inspect for poor connections at the harness connector of the vanity mirror lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 4 | Go to Step 3 |
| 3 | Replace the sunshade. Refer to Sunshade Replacement in Interior Trim. Did you complete the replacement? | Go to Step 4 | |
| 4 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Vanity Mirror Lamp(s) Always On
Vanity Mirror Lamp(s) Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Do the courtesy lamps operate properly? | Go to Step 3 | Go to Courtesy Lamps Inoperative |
| 3 | Disconnect the vanity mirror lamp harness connector. Place the interior lamp switch in the ON position. Connect a test lamp between the courtesy lamp supply voltage circuit and the ground circuit of the inoperative vanity lamp. Does the test lamp illuminate? | Go to Step 5 | Go to Step 4 |
| 4 | Test the courtesy lamp supply voltage circuit for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 6 |
| 5 | Inspect for poor connections at the harness connector of the inoperative vanity mirror lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 7 |
| 6 | Locate and repair an open or high resistance in the ground circuit of the inoperative vanity mirror lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 8 | |
| 7 | Replace the sunshade. Refer to Sunshade Replacement in Interior Trim. Did you complete the replacement? | Go to Step 8 | |
| 8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Vanity Mirror Lamp(s) Inoperative
See also:
• Diagnostic System Check - Vehicle
• Exterior Lighting Systems Description and Operation
• Checking Aftermarket Accessories
• Testing for Intermittent Conditions and Poor Connections
• Master Electrical Component List
• Relay Replacement (Within an Electrical Center)
• Circuit Testing
• Wiring Repairs
• Connector Repairs
• Control Module References
• Door Control Module Schematics
• Lighting Systems Connector End Views
• Symptoms - Hydraulic Brakes
• Multifunction, Turn Signal Switch Replacement
• Wiper/Washer System Schematics
• Inside Rearview Mirror Schematics
• Compartment Replacement - Instrument Panel (I/P)
• Instrument Panel, Gages, and Console Connector End Views
• Trim, Lid, Latch, Strut, Hinge Replacement - Rear Compartment
• Trunk Release Inoperative (Interior Release Inoperative )
• Trunk Release Inoperative (Exterior Release Inoperative)
• Sunshade Replacement
• Backup Lamps Always On
• Backup Lamps Inoperative
• Cornering Lamps Inoperative
• Courtesy Lamps Always On
• Courtesy Lamps Inoperative
• Daytime Running Lamps (DRL) Inoperative (Domestic/Canadian)
• Daytime Running Lamps (DRL) Inoperative (Norway/Sweden)
• Fog Lamp Indicator Always On
• Fog Lamp Indicator Inoperative
• Fog Lamp Indicator Inoperative - Rear (Export)
• Fog Lamps Always On
• Fog Lamps Inoperative
• Fog Lamps Always On - Rear
• Fog Lamps Inoperative - Rear
• Hazard Lamps Always On
• Hazard Lamps Inoperative
• Headlamps Always On - Low or High Beam (Standard)
• Headlamps Inoperative - High Beams (Standard)
• Headlamps Inoperative - High Beams (with Intellibeam)
• Headlamps Inoperative - Low Beams (Standard Headlamps)
• Headlamps Inoperative - Low Beams (HID Headlamps)
• Headlamps Inoperative - Flash to Pass
• High Beam Indicator Always On
• High Beam Indicator Inoperative (Standard)
• High Beam Indicator Inoperative (with Intellibeam)
• Illuminated Entry Lamps Inoperative
• Interior Backlighting Does Not Dim
• Interior Backlighting Inoperative
• Instrument Panel (I/P) Compartment Lamp Inoperative
• License Lamps Inoperative
• Lights On Indicator Always On
• Lights On Indicator Inoperative
• Park Lamps Always On
• Park Lamps Inoperative
• Reading Lamp(s) Inoperative
• Rear Compartment Lamp(s) Always On
• Rear Compartment Lamp(s) Inoperative
• Repeater Lamps Inoperative
• Stop Lamps Always On
• Turn Signal Lamps and/or Indicators Always On or Flashing
• Turn Signal Lamps and/or Indicators Inoperative
• Twilight Sentinel Inoperative
• Vanity Mirror Lamp(s) Always On
• Vanity Mirror Lamp(s) Inoperative
• Symptoms - Lighting Systems