Symptoms - Lighting Systems
| IMPORTANT | The following steps must be completed before using a symptom table |
- Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/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 conditions are true: There are no DTCs set. The control modules can communicate via the serial data link.
- Review the system description and operation in order to familiarize yourself with the system functions. Refer to the following procedures: «Exterior Lighting Systems Description and Operation»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-introduction-2-of-2) «Interior Lighting Systems Description and Operation»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-introduction-2-of-2)
Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the lighting system. Refer to «Checking Aftermarket Accessories»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__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 (Automatic Transmission)»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__backup-lamps-always-on-automatic-transmission)
- «Backup Lamps Inoperative (Automatic Transmission)»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__backup-lamps-inoperative-automatic-transmission)
- «Console Lamp Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__console-lamp-always-on)
- «Console Lamp Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__console-lamp-inoperative)
- «Courtesy Lamps Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__courtesy-lamps-always-on)
- «Courtesy Lamps Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__courtesy-lamps-inoperative)
- «Daytime Running Lamps (DRL) Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__daytime-running-lamps-drl-inoperative)
- «Exterior Courtesy Lamp(s) Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__exterior-courtesy-lamps-always-on)
- «Exterior Courtesy Lamp(s) Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__exterior-courtesy-lamps-inoperative)
- «Fog Lamp Indicator Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__fog-lamp-indicator-always-on)
- «Fog Lamp Indicator Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__fog-lamp-indicator-inoperative)
- «Rear Fog Lamp Indicator Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__rear-fog-lamp-indicator-always-on)
- «Rear Fog Lamp Indicator Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__rear-fog-lamp-indicator-inoperative)
- «Fog Lamps Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__fog-lamps-always-on)
- «Fog Lamps Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__fog-lamps-inoperative)
- «Rear Fog Lamps Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__rear-fog-lamps-always-on)
- «Rear Fog Lamps Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__rear-fog-lamps-inoperative)
- «Hazard Lamps Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__hazard-lamps-always-on)
- «Hazard Lamps Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__hazard-lamps-inoperative)
- «Headlamp Low or High Beams Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__headlamp-low-or-high-beams-always)
- «Headlamps Inoperative - High Beams»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__headlamps-inoperative-high-beams)
- «Headlamps Inoperative - Low Beams»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__headlamps-inoperative-low-beams)
- «Headlamps Flash to Pass Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__headlamps-flash-to-pass-inoperative)
- «High Beam Indicator Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__high-beam-indicator-always-on)
- «High Beam Indicator Inoperative (Standard)»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__high-beam-indicator-inoperative-standard)
- «High Mount Stop Lamp Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms)
- «High Mount Stop Lamp Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms)
- «Illuminated Entry Lamps Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__illuminated-entry-lamps-inoperative)
- «Interior Backlighting Does Not Dim»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__interior-backlighting-does-not-dim)
- «Interior Backlighting Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__interior-backlighting-inoperative)
- «Instrument Panel Compartment Lamp Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__instrument-panel-compartment-lamp-inoperative)
- «Instrument Panel Compartment Lamp Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__instrument-panel-compartment-lamp-always-on)
- «License Lamps Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__license-lamps-inoperative)
- «Lights On Indicator Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__lights-on-indicator-always-on)
- «Lights On Indicator Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__lights-on-indicator-inoperative)
- «Park Lamps Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__park-lamps-always-on)
- «Park Lamps Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__park-lamps-inoperative)
- «Inside Rearview Mirror Lamp(s) Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__inside-rearview-mirror-lamps-inoperative)
- «Stop Lamps Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms)
- «Stop Lamps Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms)
- «Turn Signal Lamps and/or Indicators Always On or Flashing»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__turn-signal-lamps-andor-indicators-always)
- «Turn Signal Lamps and/or Indicators Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__turn-signal-lamps-andor-indicators-inoperative)
- «Underhood Lamp Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__underhood-lamp-always-on)
- «Underhood Lamp Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__underhood-lamp-inoperative)
- «Vanity Mirror Lamp(s) Always On»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__vanity-mirror-lamps-always-on)
- «Vanity Mirror Lamp(s) Inoperative»(/cadillac/xlr/i-2003-2009/remont/exterior-lights/#lighting-systems-symptoms__vanity-mirror-lamps-inoperative)
Backup Lamps Always On (Automatic Transmission)
| 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 ON the ignition, with the engine OFF. Depress and hold the brake pedal. Observe the backup lamps. Shift the gear selector to the REVERSE position and then to the PARK position. Do the backup lamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Install a scan tool. Verify that the vehicle is in the PARK position. Turn ON the ignition, with the engine OFF. With the scan tool, observe the Backup Lamp Relay Cmd. parameter in the body control module (BCM) lighting data list. Does the scan tool indicate the Backup Lamp Relay Cmd. is OFF? | Go to Step 4 | Go to Step 9 |
| 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. Verify that the vehicle is in the PARK position. Turn ON the ignition, with the engine OFF. Do the backup lamps turn OFF? | Go to Step 6 | Go to Step 5 |
| 5 | Locate and repair a short to battery voltage in the backup lamps voltage supply 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 9 |
| 6 | Turn OFF the ignition. Connect a test lamp between the reverse lamp relay control side voltage supply circuit and the backup lamp relay control circuit. Verify that the vehicle is in the PARK position. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 9 | Go to Step 7 |
| 7 | 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 8 |
| 8 | 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 repair? | Go to Step 11 | |
| 9 | Inspect for poor connections at the harness connector of the BCM. 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 |
| 10 | Replace the BCM. 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 (Automatic Transmission)
Backup Lamps Inoperative (Automatic Transmission)
| 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 ON the ignition, with the engine OFF. Depress and hold the brake pedal. Place the gear selector in the REVERSE position. Observe the backup lamps. Do both backup lamps illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Is only one backup lamp inoperative? | Go to Step 7 | Go to Step 4 |
| 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. Turn ON the ignition, with the engine OFF. Probe the reverse lamp relay control side voltage supply circuit with a test lamp that is connected to ground. Does the test lamp illuminate? | Go to Step 5 | Go to Step 8 |
| 5 | Turn OFF the ignition. Connect a test lamp between the reverse lamp relay control side voltage supply circuit and the backup lamp relay control circuit. Turn ON the ignition, with the engine OFF. Depress and hold the brake pedal. Place the gear selector in the REVERSE position. Does the test lamp illuminate? | Go to Step 6 | Go to Step 10 |
| 6 | Turn OFF the ignition. Connect a 15-amp fused jumper between the reverse lamp relay control side voltage supply circuit and the backup lamps supply voltage circuit. Turn ON the ignition, with the engine OFF. Do the backup lamps illuminate? | Go to Step 11 | Go to Step 7 |
| 7 | Locate and repair an open or high resistance in the backup lamp voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 12 |
| 8 | Locate and repair an open or high resistance in the reverse lamp relay control side voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 9 |
| 9 | Inspect for poor connections at the C3 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 16 | Go to Step 14 |
| 10 | Inspect for poor connections at the harness connector of the body control module (BCM). 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 16 | Go to Step 15 |
| 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 16 | Go to Step 13 |
| 12 | Locate and repair an open or high resistance in the backup lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 16 | |
| 13 | 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 repair? | Go to Step 16 | |
| 14 | Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems. Did you complete the repair? | Go to Step 16 | |
| 15 | Replace the BCM. Refer to Body Control Module Replacement in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 16 | |
| 16 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Backup Lamps Inoperative (Automatic Transmission)
Console Lamp 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 | Open and close the center console compartment. Does the courtesy lamp console turn ON and OFF? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Disconnect the courtesy lamp switch console harness connector. Does the courtesy lamp-console turn OFF? | Go to Step 5 | Go to Step 4 |
| 4 | Inspect for poor connections at the harness connector of the courtesy lamp console. 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 6 |
| 5 | Inspect for poor connections at the harness connector of the courtesy lamp switch console. 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 a short to ground in the courtesy lamp switch console voltage supply circuit between the courtesy lamp console and the courtesy lamp switch console. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 8 | |
| 7 | Replace the courtesy lamp switch console. 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 1 |
Console Lamp Always On
Console 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 | Do the courtesy lamps operate properly? | Go to Step 3 | Go to Courtesy Lamps Inoperative |
| 3 | Disconnect the courtesy lamp switch console harness connector. Place the interior lamp switch in the ON position. Connect a test lamp between the courtesy lamp switch console voltage supply circuit and the courtesy lamp switch console ground circuit. Does the test lamp illuminate? | Go to Step 6 | Go to Step 4 |
| 4 | Inspect for poor connections at the harness connector of the courtesy lamp console. 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 5 |
| 5 | Test the courtesy lamp switch console voltage supply circuit for an open, short to ground, or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the harness connector of the courtesy lamp switch console. 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 |
| 7 | Locate and repair an open or high resistance in the courtesy lamp switch console ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 9 | |
| 8 | Replace the courtesy lamp switch-console. 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 |
Console Lamp Inoperative
Courtesy Lamps Always On
| 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 | Place the headlamp switch in the OFF position. Close all doors. Are all of the courtesy lamps OFF? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Disconnect the C4 harness connector at the body control module (BCM). Do the courtesy lamps turn OFF? | Go to Step 4 | Go to Step 5 |
| 4 | Inspect for poor connections at the C4 harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and SIR/SRS Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 7 | Go to Step 6 |
| 5 | Locate and repair a short to ground in the courtesy lamp low control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 7 | |
| 6 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 7 | |
| 7 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Courtesy Lamps Always On
Courtesy Lamps 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 | Open each door and rear hatch one at a time. Do all of the courtesy lamps illuminate when each door and rear hatch is opened? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are the courtesy lamps inoperative when only one door is opened? | Go to Diagnostic Starting Point - Doors in Doors | Go to Step 4 |
| 4 | Are all of the courtesy lamps inoperative? | Go to Step 7 | Go to Step 5 |
| 5 | Test the inoperative courtesy lamp voltage supply 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 9 | Go to Step 6 |
| 6 | Test the courtesy lamp low control circuit for an open or short to battery positive voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 7 |
| 7 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and SIR/SRS Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 8 |
| 8 | Replace the BCM. 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 |
Courtesy Lamps Inoperative
Daytime Running Lamps (DRL) 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 | Place the ignition switch in the OFF position. Apply the park brake. Place the headlamp switch in the OFF position. Turn ON the ignition, with the engine OFF. Place the turn signal switch in the RH ON position. Place the turn signal switch in the LH ON position. Do the front turn signals operate properly? | Go to Step 3 | Go to Turn Signal Lamps and/or Indicators Inoperative |
| 3 | Release the park brake. Apply a bright incandescent light to the sunload sensor assembly. Place the turn signal switch in the OFF position. Do the front turn signals lamps illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 |
| 4 | Is the park brake indicator in the instrument panel cluster (IPC) ON? | Go to Brake Warning Indicator Always On in Hydraulic Brakes | Go to Step 5 |
| 5 | Install a scan tool. Turn ON the ignition, with the engine OFF. Apply a bright incandescent light to the sunload sensor assembly. With a scan tool, observe the Right and Left Sunload Sensor parameters in the HVAC system data display. Does the scan tool indicate that the right and left Sunload Sensor parameters are between 50-60 counts? | Go to Step 7 | Go to Step 6 |
| 6 | Test the ambient light sensor 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 10 | Go to Step 8 |
| 7 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and SIR/SRS Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 9 |
| 8 | Replace the sunload sensor assembly. Refer to Sun Load Sensor Replacement in HVAC Systems - Automatic. Did you complete the replacement? | Go to Step 10 | |
| 9 | Replace the BCM. 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 |
Daytime Running Lamps (DRL) Inoperative
Exterior Courtesy Lamp(s) 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 Control Systems |
| 2 | Operate each door. Do the exterior courtesy lamps located on both doors illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Open the driver door. Do the interior courtesy lamps operate normally? | Go to Step 4 | Go to Courtesy Lamps Inoperative |
| 4 | Are both exterior courtesy lamps ON at all times? | Go to Step 7 | Go to Step 5 |
| 5 | Disconnect the exterior courtesy lamp from the door control module associated with the exterior courtesy lamp in question. Does the exterior courtesy lamp turn OFF? | Go to Step 6 | Go to Step 10 |
| 6 | Inspect for poor connections at the harness connector of the door control module. Refer to Testing for Intermittent Conditions and Poor Connections and SIR/SRS 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 body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and SIR/SRS Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 |
| 8 | Replace the appropriate 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 11 | |
| 9 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 11 | |
| 10 | Locate and repair a short to battery positive voltage in the courtesy lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 11 | |
| 11 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Exterior Courtesy Lamp(s) Always On
Exterior Courtesy Lamp(s) 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 each door. Does the exterior courtesy lamp illuminate for each door? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Open the driver door. Do the interior courtesy lamps operate normally? | Go to Step 4 | Go to Courtesy Lamps Inoperative |
| 4 | Are both exterior courtesy lamps inoperative? | Go to Step 8 | Go to Step 5 |
| 5 | Disconnect the inoperative exterior courtesy lamp from the corresponding door control module. Connect a test light between the courtesy lamps supply voltage circuit at the door control module and a good ground. Does the test light illuminate? | Go to Step 6 | Go to Step 7 |
| 6 | Locate and repair an open, high resistance, or short to ground in the courtesy lamps supply voltage 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 11 |
| 7 | Inspect for poor connections at the harness connector of the door control module. Refer to Testing for Intermittent Conditions and Poor Connections and SIR/SRS Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 9 |
| 8 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and SIR/SRS Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
| 9 | Replace the appropriate 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 12 | |
| 10 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 12 | |
| 11 | Locate and repair an open, high resistance, or short to battery positive voltage in the exterior courtesy lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | 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 |
Exterior Courtesy Lamp(s) Inoperative
Fog Lamp Indicator Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights 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 |
| 2 | Turn ON the ignition, with the engine OFF. Observe the front fog lamp indicator. Turn the front fog lamps ON and OFF. Does the front fog lamp indicator operate properly? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Do the front fog lamps operate properly? | Go to Step 4 | Go to Symptoms - Lighting Systems |
| 4 | 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 . Did you find and correct the condition? | Go to Step 6 | Go to Step 5 |
| 5 | Replace the IPC. Refer to Control Module References for replacement, setup, and programming. Did you complete the repair? | 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 |
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 | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Turn ON the ignition, with the engine OFF. Observe the front fog lamp indicator. Turn the front fog lamps ON and OFF. Does the front fog lamp indicator operate properly? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Do the front fog lamps operate properly? | Go to Step 4 | Go to Symptoms - Lighting Systems |
| 4 | 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 . Did you find and correct the condition? | Go to Step 6 | Go to Step 5 |
| 5 | Replace the IPC. Refer to Control Module References 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 |
Fog Lamp Indicator Inoperative
Rear 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 | Turn ON the ignition, with the engine OFF. Observe the rear fog lamp indicator. Turn the rear fog lamps ON and OFF. Does the rear fog lamp indicator operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Do the rear fog lamps operate properly? | Go to Step 4 | Go to Symptoms - Lighting Systems |
| 4 | 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 6 | Go to Step 5 |
| 5 | 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 6 | |
| 6 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Rear Fog Lamp Indicator Always On
Rear 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 | Turn ON the ignition, with the engine OFF. Observe the rear fog lamp indicator. Turn the rear fog lamps ON and OFF. Does the rear fog lamp indicator operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Do the rear fog lamps operate properly? | Go to Step 4 | Go to Symptoms - Lighting Systems |
| 4 | 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 6 | Go to Step 5 |
| 5 | 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 6 | |
| 6 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Rear Fog Lamp Indicator Inoperative
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 | Turn ON the ignition, with the engine OFF. Turn the front fog lamps ON and OFF. Do the front fog 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. Place the front fog lamp switch in the OFF position. With a scan tool, observe the Front Fog Lamp Switch parameter in the body control module (BCM) lighting data list. Does the scan tool indicate the front fog lamp switch parameter is Inactive? | Go to Step 4 | Go to Step 7 |
| 4 | Turn OFF the front fog lamps. With a scan tool, observe the Fog Lamp Relay Cmd. parameter in the BCM lighting data list. Does the scan tool indicate the fog lamp relay Cmd. parameter is Off? | Go to Step 5 | Go to Step 10 |
| 5 | Turn OFF the ignition. Disconnect the FRT FOG LP 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 6 | Go to Step 13 |
| 6 | Turn OFF the ignition. Connect a test lamp between the front fog lamp relay control voltage supply circuit at the underhood fuse block and ground. Turn OFF the front fog lamps. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 8 | Go to Step 12 |
| 7 | Turn OFF the ignition. Disconnect the turn signal/multifunction switch. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Front Fog Lamp Switch parameter in the BCM lighting data list. Does the scan tool indicate the Front Fog Lamp Switch parameter is Inactive? | Go to Step 11 | Go to Step 9 |
| 8 | Locate and repair a short to voltage in the front fog lamp relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 10 |
| 9 | Locate and repair a short to ground in the front fog lamp switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 10 |
| 10 | Inspect for poor connections at the harness connector of the BCM. 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 15 |
| 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 19 | Go to Step 16 |
| 12 | Inspect for poor connections at the FRT FOG LP 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 18 |
| 13 | 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 you find and correct the condition? | Go to Step 19 | Go to Step 14 |
| 14 | 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 19 | Go to Step 17 |
| 15 | Replace the BCM. Refer to Body Control Module Replacement in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 19 | |
| 16 | Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 19 | |
| 17 | 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 19 | |
| 18 | Replace the FRT FOG LP 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 | |
| 19 | 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 | Turn ON the ignition, with the engine OFF. Turn ON the front fog lamps. Do the front fog lamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are both front fog lamps inoperative? | Go to Step 4 | Go to Step 18 |
| 4 | Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Front Fog Lamp Switch parameter in the body control module (BCM) lighting data list. Turn the front fog lamp switch ON and OFF. Does the scan tool indicate the front fog lamp switch parameter changes from Active to Inactive as the switch is cycled? | Go to Step 5 | Go to Step 10 |
| 5 | Turn the front fog lamp switch to the ON position. With a scan tool, observe the Fog Lamp Relay Cmd. in the BCM lighting data list. Does the scan tool indicate the fog lamp relay Cmd. parameter is ON? | Go to Step 6 | Go to Step 13 |
| 6 | Turn OFF the ignition. Disconnect the FRT FOG LP relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Connect a 15-amp fused jumper between the FRT FOG LP relay switched voltage supply circuit and the front fog lamp voltage supply circuit. Do the front fog lamps illuminate? | Go to Step 7 | Go to Step 16 |
| 7 | Connect a test lamp between the front fog lamp relay control circuit and ground at the FRT FOG LP relay terminal. Turn ON the ignition, with the engine OFF. Turn the front fog lamp switch to the ON position. Do the test lamp illuminate? | Go to Step 8 | Go to Step 9 |
| 8 | Locate and repair an open or high resistance in the FRT FOG LP relay ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 15 |
| 9 | Locate and repair an open, high resistance, or short to ground in the front fog lamp relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 17 |
| 10 | Turn OFF the ignition. Disconnect 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 Switch parameter. Does the scan tool display Active? | Go to Step 14 | Go to Step 11 |
| 11 | Locate and repair an open or high resistance in the front fog lamp switch ground circuit. 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 | Locate and repair an open, high resistance, or short to voltage in the front fog lamp switch signal circuit. 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 | Inspect for poor connections at the harness connector of the BCM. 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 |
| 14 | 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 24 | Go to Step 21 |
| 15 | Inspect for poor connections at the FRT FOG LP 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 23 |
| 16 | Test the front fog lamp voltage supply 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 24 | Go to Step 17 |
| 17 | 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 24 | Go to Step 22 |
| 18 | Test the front fog lamp voltage supply circuit of the inoperative fog lamp 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 24 | Go to Step 19 |
| 19 | Test the front fog lamp ground circuit of the inoperative fog 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 24 | |
| 20 | Replace the BCM. Refer to Body Control Module Replacement in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 24 | |
| 21 | Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 24 | |
| 22 | 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 24 | |
| 23 | Replace the FRT FOG LP 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 | |
| 24 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Fog Lamps Inoperative
Rear 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 | Turn ON the ignition, with the engine OFF. Turn ON the low beam headlamps. Turn the rear fog lamps ON and OFF. Do the rear fog 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. Place the rear fog lamp switch in the OFF position. With a scan tool, observe the Rear Fog Lamp Switch parameter in the body control module (BCM) lighting data list. Does the scan tool indicate the rear fog lamp switch parameter is Inactive? | Go to Step 4 | Go to Step 7 |
| 4 | With a scan tool, observe the Rear Fog Lamp Relay Cmd. in the BCM lighting data list. Does the scan tool indicate the rear fog lamp relay Cmd. parameter is Off? | Go to Step 5 | Go to Step 10 |
| 5 | Turn OFF the ignition. Disconnect the FOG RR 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 6 | Go to Step 13 |
| 6 | Turn OFF the ignition. Connect a test lamp between the rear fog lamp relay control circuit and the rear FOG RR voltage supply circuit at the I/P relay block. Turn OFF the rear fog lamp switch. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 8 | Go to Step 12 |
| 7 | Turn OFF the ignition. Disconnect the turn signal/multifunction switch. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Rear Fog Lamp Switch parameter in the BCM lighting data list. Does the scan tool indicate the Rear Fog Lamp Switch parameter is Inactive? | Go to Step 11 | Go to Step 9 |
| 8 | Locate and repair a short to ground in the rear fog lamp relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 14 |
| 9 | Locate and repair a short to ground in the rear fog lamp switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 10 |
| 10 | Inspect for poor connections at the harness connector of the BCM. 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 15 |
| 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 19 | Go to Step 16 |
| 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 19 | Go to Step 18 |
| 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 you find and correct the condition? | Go to Step 19 | Go to Step 14 |
| 14 | Inspect for poor connections at the instrument panel (I/P) relay 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 19 | Go to Step 17 |
| 15 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 19 | |
| 16 | Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 19 | |
| 17 | Replace the I/P relay block. Did you complete the replacement? | Go to Step 19 | |
| 18 | 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 19 | |
| 19 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Rear Fog Lamps Always On
Rear 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 | Turn ON the ignition, with the engine OFF. Turn ON the low beam headlamps. Turn ON the rear fog lamps. Do the rear fog lamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are both rear fog lamps inoperative? | Go to Step 4 | Go to Step 19 |
| 4 | Install a scan tool. Turn ON the ignition, with the engine OFF. Turn ON the low beam headlamps. With a scan tool, observe the Rear Fog Lamp Switch parameter in the body control module (BCM) lighting data list. Turn the rear fog lamp switch ON and OFF. Does the scan tool indicate the rear fog lamp switch parameter changes from Active to Inactive as the switch is cycled? | Go to Step 5 | Go to Step 9 |
| 5 | Turn the rear fog lamp switch to the ON position. With a scan tool, observe the Rear Fog Lamp Relay Cmd. in the BCM lighting data list. Does the scan tool indicate the rear fog lamp relay Cmd. parameter is ON? | Go to Step 6 | Go to Step 12 |
| 6 | Turn OFF the ignition. Disconnect the FOG RR relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Connect a 15-amp fused jumper between the FOG RR relay switched voltage supply circuit and the rear fog lamp voltage supply circuit. Turn ON the ignition, with the engine OFF. Do the rear fog lamps illuminate? | Go to Step 7 | Go to Step 15 |
| 7 | Connect a test lamp between the rear fog lamp relay control circuit and the FOG RR relay voltage supply circuit. Turn ON the ignition, with the engine OFF. Place the rear fog lamp switch in the ON position. Does the test lamp illuminate? | Go to Step 14 | Go to Step 8 |
| 8 | Locate and repair an open or high resistance in the rear fog lamp relay control circuit. 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 |
| 9 | Turn OFF the ignition. Disconnect 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. With a scan tool observe the Rear Fog Lamp Switch parameter. Does the scan tool display Active? | Go to Step 13 | Go to Step 10 |
| 10 | Locate and repair an open or high resistance in the rear fog lamp switch ground circuit. 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 | Locate and repair an open, high resistance, or short to voltage in the rear fog lamp switch signal circuit. 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 | Inspect for poor connections at the harness connector of the BCM. 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 |
| 13 | 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 |
| 14 | Inspect for poor connections at the FOG RR 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 24 |
| 15 | Test the rear fog lamp voltage supply 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 16 |
| 16 | Test the rear fog lamp 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 17 |
| 17 | Test the FOG RR relay voltage supply 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 |
| 18 | Inspect for poor connections at the instrument panel (I/P) relay 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 25 | Go to Step 23 |
| 19 | Test the rear fog lamp voltage supply circuit of the inoperative fog lamp 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 20 |
| 20 | Test the rear fog lamp ground circuit of the inoperative fog 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 25 | |
| 21 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 25 | |
| 22 | Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 25 | |
| 23 | Replace the I/P relay block. Did you complete the replacement? | Go to Step 25 | |
| 24 | Replace the FOG RR 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 | |
| 25 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Rear Fog Lamps Inoperative
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 | Place the hazard switch in the OFF position. Do the hazard lamps remain ON? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Turn OFF the ignition. Disconnect the hazard switch. Refer to Hazard Warning Switch Replacement . Do the hazard lamps turn OFF? | Go to Step 5 | Go to Step 4 |
| 4 | Locate and repair a short to ground in the hazard switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 6 |
| 5 | 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 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the C2 harness connector of the body control module (BCM). 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 |
| 7 | Replace the hazard switch. Refer to Hazard Warning Switch Replacement . Did you complete the repair? | Go to Step 9 | |
| 8 | Replace the BCM. 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 |
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 | Place the hazard switch in the ON position. Do the hazard lamps turn ON? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Turn OFF the ignition. Disconnect the hazard switch. Refer to Hazard Warning Switch Replacement . Install a fused jumper between the hazard switch signal circuit and the hazard switch ground circuit. Do the hazard lamps illuminate? | Go to Step 6 | Go to Step 4 |
| 4 | Test the hazard switch ground circuit for and open, high resistance, or short to battery positive 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 5 |
| 5 | Test the hazard switch signal circuit for an open or short to battery positive 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 7 |
| 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 10 | Go to Step 8 |
| 7 | Inspect for poor connections at the C2 harness connector of the body control module (BCM). 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 |
| 8 | Replace the hazard switch. Refer to Hazard Warning Switch Replacement . Is the repair complete? | Go to Step 10 | |
| 9 | Replace the BCM. 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 3 |
Hazard Lamps Inoperative
Headlamp Low or High Beams 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 | Place the headlamp switch in the OFF position. Verify that the vehicle is in PARK. Turn ON the ignition, with the engine OFF. Are the headlamps ON? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Install a scan tool. Turn the headlamp switch to the OFF position. With a scan tool, observe the Headlamp Off Switch parameter in the body control module (BCM) lighting data list. Does the scan tool indicate the Headlamp Off Switch parameter is ON? | Go to Step 4 | Go to Step 13 |
| 4 | With a scan tool, observe the Headlamp On Switch parameter in the BCM lighting data list. Does the scan tool indicate the Headlamp On Switch parameter is INACTIVE? | Go to Step 6 | Go to Step 5 |
| 5 | Turn OFF the ignition. Disconnect the C3 harness connector at the turn signal/multifunction switch. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Headlamp On Switch parameter in the BCM lighting data list. Does the scan tool indicate that Headlamp On Switch parameter is INACTIVE? | Go to Step 21 | Go to Step 14 |
| 6 | Are the high beam headlamps ON? | Go to Step 9 | Go to Step 7 |
| 7 | 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. Turn ON the ignition, with the engine OFF. Do the low beam headlamps turn OFF? | Go to Step 8 | Go to Step 23 |
| 8 | Turn OFF the ignition. Turn OFF the headlamp switch. Connect a test lamp between the 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 |
| 9 | Turn ON the ignition, with the engine OFF. Verify the headlamp switch is in the OFF position. Place the headlamp dimmer switch in the low beam position. With a scan tool, observe the High Beam Select Switch parameter in the BCM lighting data list. Does the scan tool indicate the High Beam Select Switch parameter is INACTIVE? | Go to Step 11 | Go to Step 10 |
| 10 | 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 High Beam Select Switch parameter in the BCM lighting data list. Does the scan tool indicate the High Beam Select Switch parameter is INACTIVE? | Go to Step 21 | Go to Step 18 |
| 11 | 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. Turn ON the ignition, with the engine OFF. Do the high beam headlamps turn OFF? | Go to Step 12 | Go to Step 24 |
| 12 | 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 high beam headlamp relay control circuit. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 16 | Go to Step 20 |
| 13 | Turn OFF the ignition. Disconnect the C3 harness connector at the turn signal/multifunction switch. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Headlamp Off Switch parameter in the BCM lighting data list. Does the scan tool indicate the Headlamp Off Switch parameter is ON? | Go to Step 21 | Go to Step 17 |
| 14 | Locate and repair a short to ground in the headlamp switch headlamps 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 |
| 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 an open, high resistance, or short to battery voltage in the headlamp switch OFF 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 | Locate and repair an open or short to ground in the headlamp switch high beam 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 |
| 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 BCM. 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 Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 29 | |
| 28 | Replace the BCM. 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 |
Headlamp Low or High Beams Always On
Headlamps Inoperative - High Beams
| 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 | Turn ON the ignition, with the engine OFF. Turn ON the headlamp switch. Place the headlamp dimmer switch in the high beam position. Do the high beam headlamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are both high beam headlamps inoperative? | Go to Step 4 | Go to Step 9 |
| 4 | 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 body control module (BCM) exterior lamps data list. Does the High Beam Select Switch parameter display ACTIVE? | Go to Step 6 | Go to Step 5 |
| 5 | Turn OFF the ignition. Disconnect the turn signal/multifunction switch C2 harness connector. Connect a 3-amp fused jumper between the headlamp switch high beam signal circuit and the headlamp low beam relay control circuit at the turn signal/multifunction switch C2 harness connector. Turn ON the ignition, with the engine OFF. Turn ON the headlamps. With the scan tool, observe the High Beam Select Switch parameter in the BCM exterior lamps data list. Does the High Beam Select Switch parameter display ACTIVE? | Go to Step 14 | Go to Step 12 |
| 6 | 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 7 | Go to Step 11 |
| 7 | Connect a test lamp between the headlamp high beam relay switch side supply voltage circuit and a good ground. Does the test lamp illuminate? | Go to Step 8 | Go to Step 19 |
| 8 | 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 high beam headlamps illuminate? | Go to Step 15 | Go to Step 9 |
| 9 | Turn OFF the ignition. Disconnect the inoperative high beam headlamp. Connect a test lamp between the high beam headlamp supply voltage circuit and the ground circuit of the inoperative high beam headlamp. Turn ON the ignition, with the engine OFF. Turn ON the high beam headlamps. Does the test lamp illuminate? | Go to Step 17 | Go to Step 10 |
| 10 | Test the headlamp high beam 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 24 | Go to Step 18 |
| 11 | 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 24 | Go to Step 16 |
| 12 | Test the headlamp switch high beam 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 headlamp low beam relay control 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 16 |
| 14 | Inspect for poor connections at the C2 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 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 24 | Go to Step 21 |
| 16 | Inspect for poor connections at the harness connector of the BCM. 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 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 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 high 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 Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 24 | |
| 21 | 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 24 | |
| 22 | Replace the BCM. 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 high beam headlamp bulb. Refer to Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement . 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 - High Beams
Headlamps Inoperative - Low Beams
| 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 | Turn ON the ignition, with the engine OFF. Turn ON the headlamp switch. Place the headlamp dimmer switch in the low beam position. Do the low beam headlamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are both low beam headlamps inoperative? | Go to Step 4 | Go to Step 9 |
| 4 | Install a scan tool. Turn ON the ignition, with the engine OFF. Turn ON the low beam headlamps. With the scan tool, observe the Headlamp ON Switch parameter in the body control module (BCM) exterior lamps data list. Does the Headlamp ON Switch parameter display ACTIVE? | Go to Step 6 | Go to Step 5 |
| 5 | 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 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 the scan tool, observe the Headlamp ON Switch parameter in the BCM exterior lamps data list. Does the Headlamp ON Switch parameter display ACTIVE? | Go to Step 14 | Go to Step 12 |
| 6 | 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 7 | Go to Step 11 |
| 7 | Connect a test lamp between the headlamp low beam relay switch side supply voltage circuit and a good ground. Does the test lamp illuminate? | Go to Step 8 | Go to Step 19 |
| 8 | 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 low beam headlamps illuminate? | Go to Step 15 | Go to Step 9 |
| 9 | Turn OFF the ignition. Disconnect the inoperative low beam headlamp. Connect a test lamp between the low beam headlamp supply voltage circuit and the ground circuit of the inoperative low beam headlamp. Turn ON the ignition, with the engine OFF. Turn ON the low beam headlamps. Does the test lamp illuminate? | Go to Step 17 | Go to Step 10 |
| 10 | Test the headlamp low beam 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 24 | Go to Step 18 |
| 11 | Test the headlamp low beam relay control 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 16 |
| 12 | 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 13 |
| 13 | Test the headlamp 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 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 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 BCM. 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 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 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 Turn Signal Multifunction 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 BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 24 | |
| 23 | IMPORTANT: Verify that the headlamp ballast connector retaining clip is fully installed. Replace the inoperative HID headlamp ballast. Refer to High Intensity Discharge Headlamp Ballast Replacement .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 |
| IMPORTANT |
|---|
| Verify that the headlamp ballast connector retaining clip is fully installed. |
Headlamps Inoperative - Low Beams
Headlamps Flash to Pass 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 | Turn ON the ignition, with the engine OFF. Operate the flash to pass switch to the ON and OFF positions. Does the flash to pass function operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Do the high beam headlamps operate properly? | Go to Step 4 | Go to Headlamps Inoperative - High Beams |
| 4 | 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 body control module (BCM) lighting data list. Operate 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 operated? | Go to Step 9 | Go to Step 5 |
| 5 | Turn OFF the ignition. Disconnect the C2 harness connector at the turn signal/multifunction switch. Connect a 3-amp fused jumper wire between the flash to pass switch signal circuit and the ground circuit of the turn signal/multifunction switch at the C2 harness connector. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Flash to Pass Switch parameter in the BCM lighting data list. Does the scan tool indicate the Flash to Pass Switch parameter is ACTIVE? | Go to Step 8 | Go to Step 6 |
| 6 | 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 12 | Go to Step 7 |
| 7 | 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 12 | Go to Step 9 |
| 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 12 | Go to Step 10 |
| 9 | Inspect for poor connections at the harness connector of the BCM. 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 |
| 10 | Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 12 | |
| 11 | Replace the BCM. 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 |
Headlamps Flash to Pass Inoperative
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 | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Do the high and low beam headlamps operate properly? | Go to Step 3 | Go to Headlamp Low or High Beams 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 . Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the IPC. Refer to Control Module References 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 | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Do the high beam headlamps operate properly? | Go to Step 3 | Go to Headlamps Inoperative - High Beams |
| 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 . Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the IPC. Refer to Control Module References 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)
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 ON the ignition, with the engine OFF. Depress and hold the brake pedal. Observe the high mounted stop lamp (HMSL). Release the brake pedal. Did the HMSL operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are DTCs P0719 or P0724 set as current? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | Go to Step 4 |
| 4 | 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. Does the HMSL turn OFF? | Go to Step 5 | Go to Step 8 |
| 5 | Turn OFF the ignition. Connect a test lamp between the stop lamp relay control side supply voltage circuit and the stop lamp relay control circuit. Turn ON the ignition, with the engine OFF. Apply and unapply the brake pedal several times. Does the test lamp turn ON and OFF when the brake pedal is applied and unapplied? | Go to Step 6 | Go to Step 7 |
| 6 | 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 11 | Go to Step 9 |
| 7 | Inspect for poor connections at the harness connector of the body control module (BCM). 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 | Locate and repair a short to voltage in the HMSL supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 11 | |
| 9 | 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 11 | |
| 10 | Replace the BCM. 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 |
High Mount Stop Lamp 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 | Turn ON the ignition, with the engine OFF. Depress and hold the brake pedal. Observe the center high mounted stop lamp (CHMSL). Release the brake pedal. Did the CHMSL operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are DTCs P0719 or P0724 set as current? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | Go to Step 4 |
| 4 | 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 relay control side supply voltage circuit and the stop lamp relay control circuit. Turn ON the ignition, with the engine OFF. Depress and hold the brake pedal. Does the test lamp illuminate? | Go to Step 5 | Go to Step 11 |
| 5 | Turn ON the ignition, with the engine OFF. Probe the stop lamp relay switch side supply voltage circuit with a test lamp that is connected to a good ground. Does the test lamp illuminate? | Go to Step 6 | Go to Step 12 |
| 6 | Turn OFF the ignition. Connect a 15-amp fused jumper between the stop lamp relay switch side supply voltage circuit and the CHMSL supply voltage circuit. Turn ON the ignition, with the engine OFF. Does the CHMSL illuminate? | Go to Step 10 | Go to Step 7 |
| 7 | Turn OFF the ignition. Disconnect the CHMSL. Refer to High Mount Stop Lamp Replacement . Connect a test lamp between the CHMSL supply voltage circuit and the CHMSL ground circuit. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 9 | Go to Step 8 |
| 8 | Test the CHMSL 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 17 | Go to Step 13 |
| 9 | Inspect for poor connections at the CHMSL harness connector. 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 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 17 | Go to Step 14 |
| 11 | Inspect for poor connections at the harness connector of the body control module (BCM). 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 |
| 12 | Locate and repair an open or high resistance in the stop 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 17 | |
| 13 | Locate and repair an open or high resistance in the CHMSL ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | |
| 14 | 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 17 | |
| 15 | Replace the CHMSL. Refer to High Mount Stop Lamp Replacement . Did you complete the replacement? | Go to Step 17 | |
| 16 | Replace the BCM. 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 |
High Mount Stop Lamp Inoperative
Illuminated Entry Lamps 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 | Turn ON the ignition, with the engine OFF. Place the dimmer switch in the DOME position. Do the courtesy lamps operate from the interior lamp switch? | Go to Step 3 | Go to Courtesy Lamps Inoperative |
| 3 | Turn OFF the ignition. Place the dimmer switch in the OFF position. Activate each exterior door handle one at a time, waiting for the courtesy lamps to turn OFF before activating the next door handle. Observe the courtesy lamps. Do the courtesy lamps illuminate when each exterior door handle is activated? | Go to Step 4 | Go to Step 9 |
| 4 | Activate each interior door handle one at a time, waiting for the courtesy lamps to turn OFF before activating the next door handle. Observe the courtesy lamps. Do the courtesy lamps illuminate when each interior door handle is activated? | Go to Step 5 | Go to Step 6 |
| 5 | Unlock the vehicle doors using the remote keyless entry (RKE) system. Observe the courtesy lamps. Do the courtesy lamps illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 8 |
| 6 | Test the interior door handle switch signal circuit of the inoperative interior door handle for an open, high resistance, or short to battery 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 7 |
| 7 | Test the interior door handle switch ground circuit of the inoperative interior door handle for an open, high resistance, or short to battery 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 11 |
| 8 | Does the RKE doors unlock function operate properly? | Go to Step 12 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 9 | Test the exterior door handle switch signal circuit of the inoperative exterior door handle for an open, high resistance, or short to battery 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 10 |
| 10 | Test the exterior door handle switch ground circuit of the inoperative exterior door handle for an open, high resistance, or short to battery 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 11 |
| 11 | 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 15 | Go to Step 14 |
| 12 | Inspect for poor connections at the harness connector of the body control module (BCM). 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 |
| 13 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the repair? | Go to Step 15 | |
| 14 | 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 15 | |
| 15 | Operate the system in order to verify the repair. Does the system operate properly? | 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 | Turn ON the ignition, with the engine OFF. Place the headlamp switch in the PARK position. Cycle the instrument panel (I/P) lamp dimmer switch from maximum to minimum. Do the I/P lamps dim? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Install a scan tool. With a scan tool, command the I/P dimming lamps ON and OFF in the Instrument Panel (I/P) Special Functions list. Do the I/P lamps dim from maximum to minimum intensity with the scan tool commands? | Go to Step 4 | Go to Step 7 |
| 4 | Locate and repair an open, high resistance, or short to ground in the I/P lamps dimmer switch up 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 5 |
| 5 | Locate and repair an open, high resistance, or short to ground in the I/P lamps dimmer switch down 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 6 |
| 6 | Locate and repair an open or high resistance in the I/P dimmer 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 8 |
| 7 | 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 11 | Go to Step 10 |
| 8 | 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 11 | Go to Step 9 |
| 9 | Replace the I/P dimmer switch. Refer to Instrument Panel Dimmer Switch Replacement . Did you complete the replacement? | Go to Step 11 | |
| 10 | 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 11 | |
| 11 | 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 | Turn ON the ignition, with the engine OFF. Place the headlamp switch in the PARK position. Operate the instrument panel (I/P) lamp dimmer switch from minimum to maximum. Does the interior backlighting operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Do the park lamps operate properly? | Go to Step 4 | Go to Park Lamps Inoperative |
| 4 | Are all of the interior backlighting lamps inoperative? | Go to Step 9 | Go to Step 5 |
| 5 | 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. Place the headlamp switch in the PARK position. Operate the I/P lamp dimmer switch from minimum to maximum. Does the test lamp illuminate? | Go to Step 10 | Go to Step 6 |
| 6 | Test the backlight lamps control circuit of the inoperative backlight lamp 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 14 | Go to Step 7 |
| 7 | 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 14 | Go to Step 8 |
| 8 | 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 14 | Go to Step 13 |
| 9 | 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 14 | Go to Step 12 |
| 10 | 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 14 | Go to Step 11 |
| 11 | Replace the inoperative backlight bulb(s) 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 14 | |
| 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 14 | |
| 13 | 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 | |
| 14 | 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 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 | Open the instrument panel (I/P) compartment. Does the I/P compartment lamp turn ON? | 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 Courtesy Lamps Inoperative |
| 4 | Disconnect the I/P compartment lamp switch connector. Refer to Instrument Panel Compartment Lamp Switch Replacement . Connect a test lamp between the I/P compartment lamp voltage supply circuit and the I/P compartment lamp ground circuit. Does the test lamp illuminate? | Go to Step 6 | Go to Step 5 |
| 5 | Test the I/P compartment lamp voltage supply 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 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the harness connector of the I/P 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 9 | Go to Step 8 |
| 7 | Locate and repair an open or high resistance in the I/P compartment lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 9 | |
| 8 | Replace the I/P compartment lamp switch. Refer to Instrument Panel Compartment Lamp Switch Replacement . 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 3 |
Instrument Panel Compartment Lamp Inoperative
Instrument Panel Compartment Lamp 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 | Operate the instrument panel (I/P) compartment lamp switch ON and OFF. Does the I/P compartment lamp turn ON and OFF? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | 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 5 | Go to Step 4 |
| 4 | Replace the I/P compartment lamp switch. Refer to Instrument Panel Compartment Lamp Switch Replacement . 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 1 |
Instrument Panel Compartment Lamp Always On
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 | Turn ON the ignition, with the engine OFF. Place the headlamp switch in the PARK position. Do the license lamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Do the park lamps operate properly? | Go to Step 4 | Go to Park Lamps Inoperative |
| 4 | Turn OFF the ignition. Disconnect the inoperative license lamp harness connector. Connect a test lamp between the license lamp supply voltage circuit and the license lamp ground circuit. Turn ON the ignition, with the engine OFF. Turn ON the park lamps. Does the test lamp illuminate? | Go to Step 6 | Go to Step 5 |
| 5 | Test the inoperative license lamp voltage supply 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 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the harness connector of the inoperative license 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 9 | Go to Step 8 |
| 7 | Locate and repair an open or high resistance in the inoperative license lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | |
| 8 | Replace the inoperative license lamp. Refer to Rear License Lamp Replacement . 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 |
License Lamps Inoperative
Lights On 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 | Turn ON the ignition, with the engine OFF. Turn OFF the headlamps. Is the lights ON indicator illuminated? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Install a scan tool. Turn OFF the headlamps. View the Headlamp ON Switch parameter in the body control module (BCM) lighting data list. Does the Headlamp ON Switch parameter indicate Active? | Go to Step 5 | Go to Step 4 |
| 4 | 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 8 | Go to Step 6 |
| 5 | Inspect for poor connections at the harness connector of the BCM. 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 | 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 8 | |
| 7 | Replace the BCM. 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 |
Lights On Indicator Always On
Lights On 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 | Turn ON the ignition, with the engine OFF. Turn ON the headlamps. Does the Lights ON indicator illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Install a scan tool. Turn ON the headlamps. View the Headlamp ON Switch parameter in the body control module (BCM) lighting data list. Does the Headlamp ON Switch parameter indicate Active? | Go to Step 4 | Go to Step 5 |
| 4 | 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 8 | Go to Step 6 |
| 5 | Inspect for poor connections at the harness connector of the BCM. 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 | 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 8 | |
| 7 | Replace the BCM. 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 3 |
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 | Turn OFF the ignition. Observe the park lamps. Turn the park lamps ON and OFF. Do the park 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. Verify the park lamps are turned OFF. With the scan tool, observe the Park Lamp Switch parameter in the body control module (BCM) lighting data list. Does the Park Lamp Switch parameter display OFF? | Go to Step 5 | Go to Step 4 |
| 4 | Turn OFF the ignition. Disconnect the turn signal/multifunction switch C3 harness connector. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Turn ON the ignition, with the engine OFF. With the scan tool, observe the Park Lamp Switch parameter in the BCM lighting data list. Does the Park Lamp Switch parameter display OFF? | Go to Step 9 | Go to Step 8 |
| 5 | Turn OFF the ignition. Disconnect the park lamp relay. Turn ON the ignition, with the engine OFF. Do the park lamps turn OFF? | Go to Step 6 | Go to Step 12 |
| 6 | 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. Turn ON the ignition, with the engine OFF. Turn the park lamps ON and OFF with the turn signal/multifunction switch. Does the test lamp turn ON and OFF as the turn signal/multifunction switch is cycled? | Go to Step 10 | Go to Step 7 |
| 7 | Locate and repair a short to ground in the park lamp relay control 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 11 |
| 8 | Locate and repair a short to ground in the park lamp switch ON signal 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 11 |
| 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 17 | Go to Step 14 |
| 10 | 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 |
| 11 | Inspect for poor connections at the harness connector of the BCM. 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 |
| 12 | Locate and repair a short to battery positive 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 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 Turn Signal Multifunction 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 BCM. 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 | Turn OFF the ignition. Observe the park lamps. Turn the park lamps ON and OFF. Do the park 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 engine OFF. Place the headlamp switch in the PARK position. With the scan tool, observe the Park Lamp Switch parameter in the Body Control Module (BCM) lighting data list. Does the Park Lamp Switch data parameter display ON? | Go to Step 5 | Go to Step 4 |
| 4 | 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 BCM lighting data list. Does the Park Lamp Switch data parameter display ON? | Go to Step 11 | Go to Step 7 |
| 5 | 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 and OFF with the turn signal/multifunction switch. Does the test lamp turn ON and OFF as the turn signal/multifunction switch is cycled? | Go to Step 9 | Go to Step 6 |
| 6 | Test the park 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 18 | Go to Step 13 |
| 7 | 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 18 | Go to Step 8 |
| 8 | Locate and repair an open, high resistance, or short to voltage in the park lamp switch ON signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 13 |
| 9 | Turn OFF the ignition. Connect a 10-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 12 | Go to Step 10 |
| 10 | Locate and repair an open, high resistance, or short to ground 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 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 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 18 | Go to Step 16 |
| 13 | Inspect for poor connections at the harness connector of the BCM. 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 |
| 14 | Locate and repair an 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 18 | |
| 15 | Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 18 | |
| 16 | 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 18 | |
| 17 | Replace the BCM. 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 |
Park Lamps Inoperative
Inside Rearview 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 | Turn ON the inside rearview mirror reading lamps. Do the reading lamps 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 Courtesy Lamps Inoperative |
| 4 | Disconnect the inside rearview mirror harness connector. Connect a test lamp between the inside rearview mirror supply voltage circuit and the inside rearview mirror ground circuit. Does the test lamp illuminate? | Go to Step 6 | Go to Step 5 |
| 5 | Test the inside rearview mirror 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 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the harness connector of the inside rearview mirror. 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 |
| 7 | Locate and repair an open or high resistance in the ground circuit of the inside rearview mirror. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 9 | |
| 8 | Replace the inside rearview mirror. Refer to Inside Rearview Mirror Replacement in Stationary Windows. 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 |
Inside Rearview Mirror Lamp(s) Inoperative
| 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 ON the ignition, with the engine OFF. Observe the stop lamps. Press and release the brake pedal. Do the stop lamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Turn OFF the ignition. Disconnect body control module (BCM) C3 harness connector. Turn ON the ignition, with the engine OFF. Do the stop lamps turn OFF? | Go to Step 4 | Go to Step 5 |
| 4 | Inspect for poor connections at the C3 harness connector of the BCM. 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 7 | Go to Step 6 |
| 5 | Locate and repair a short to battery voltage in the stop lamps supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 7 | |
| 6 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems. Did you complete the replacement? | Go to Step 7 | |
| 7 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
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 | Turn ON the ignition, with the engine OFF. Observe the stop lamps. Press and release the brake pedal. Do the stop lamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are all of the stop lamps inoperative? | Go to Step 4 | Go to Step 5 |
| 4 | Turn OFF the ignition. Disconnect the body control module (BCM) C3 harness connector. Install a 10-amp fused jumper between battery positive voltage and the stop/turn lamp voltage supply circuit for both right and left stop lamp circuits. Do both stop lamps illuminate? | Go to Step 8 | Go to Step 5 |
| 5 | Test the voltage supply circuit of the inoperative stop lamp 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 11 | 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 11 | Go to Step 7 |
| 7 | Inspect for poor connections at the harness connector of the inoperative stop 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 11 | Go to Step 10 |
| 8 | Inspect for poor connections at the C3 harness connector of the BCM. 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 |
| 9 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems. Did you complete the replacement? | Go to Step 11 | |
| 10 | Replace the inoperative stop lamp. Refer to Tail/Turn Signal Lamp Replacement . 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 |
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 | Turn ON the ignition, with the engine OFF. Operate the turn signals. Observe the turn signal lamps and indicators. Do the turn signal lamps and indicators operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are only the turn signal indicators in the instrument panel cluster (IPC) always ON or flashing? | Go to Step 10 | Go to Step 4 |
| 4 | Are all of the turn signals lamps flashing? | Go to Step 5 | Go to Step 7 |
| 5 | Disconnect the hazard switch. Refer to Hazard Warning Switch Replacement . Are the turn signal lamps flashing? | Go to Step 6 | Go to Step 12 |
| 6 | Locate and repair a short to ground in the hazard switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 11 |
| 7 | Turn OFF the ignition. Disconnect the C4 harness connector at the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Turn ON the ignition, with the engine OFF. Observe the turn signals. Did the turn signals turn OFF? | Go to Step 13 | Go to Step 8 |
| 8 | Test the affected turn signal 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 9 |
| 9 | Test the affected turn signal lamp supply voltage circuit for a short to battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 11 |
| 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 18 | Go to Step 14 |
| 11 | Inspect for poor connections at the harness connector of the body control module (BCM). 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 |
| 12 | 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 18 | Go to Step 15 |
| 13 | 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 16 |
| 14 | 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 18 | |
| 15 | Replace the hazard switch. Refer to Hazard Warning Switch Replacement . Did you complete the replacement? | Go to Step 18 | |
| 16 | Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 18 | |
| 17 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the repair? | 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 |
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 | Turn ON the ignition, with the engine OFF. Operate the turn signals. Observe the turn signal lamps and indicators. Do the turn signal lamps and indicators operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are only the turn signal indicators in the instrument panel cluster (IPC) inoperative? | Go to Step 13 | Go to Step 4 |
| 4 | Are all turn signal lamps inoperative? | Go to Step 5 | Go to Step 10 |
| 5 | Place the hazard switch in the ON position. Do all hazard lamps operate properly? | Go to Step 6 | Go to Step 14 |
| 6 | Turn OFF the ignition. Disconnect the C4 harness connector at the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Connect a 3-amp fused jumper between the left turn signal switch signal circuit and a good ground. Turn ON the ignition, with the engine OFF. Do the left turn signal lamps illuminate? | Go to Step 7 | Go to Step 8 |
| 7 | Turn OFF the ignition. Connect a 3-amp fused jumper between the right turn signal switch signal circuit and a good ground. Turn ON the ignition, with the engine OFF. Do the right turn signal lamps illuminate? | Go to Step 9 | Go to Step 8 |
| 8 | Test for an open, high resistance, or short to battery voltage in the 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 19 | Go to Step 14 |
| 9 | Test the turn signal/multifunction switch ground circuit for an open, high resistance, or short to battery 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 |
| 10 | Test the inoperative turn signal 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 11 |
| 11 | Locate and repair an open, high resistance, or short to battery voltage in the ground circuit of the inoperative turn signal lamp. 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 |
| 12 | 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 19 | Go to Step 16 |
| 13 | 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 19 | Go to Step 17 |
| 14 | Inspect for poor connections at the harness connector of the body control module (BCM). 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 |
| 15 | Replace the inoperative turn signal lamp. Refer to Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement and Tail/Turn Signal Lamp Replacement . Did you complete the repair? | Go to Step 19 | |
| 16 | Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 19 | |
| 17 | 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 19 | |
| 18 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the repair? | Go to Step 19 | |
| 19 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Turn Signal Lamps and/or Indicators Inoperative
Underhood Lamp 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 | Turn ON the ignition, with the engine OFF. Verify that the vehicles hood is closed properly. Does the underhood lamp remain illuminated? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Inspect for poor connections at the harness connector of the underhood 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 5 | Go to Step 4 |
| 4 | Replace the underhood lamp switch. Refer to Underhood Lamp Replacement . 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 1 |
Underhood Lamp Always On
Underhood 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 | Open the vehicle hood. Does the underhood lamp turn ON? | 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 Courtesy Lamps Inoperative |
| 4 | Disconnect the underhood lamp harness connector. Turn ON the ignition, with the engine OFF. Connect a test lamp between the underhood lamp voltage supply circuit and the underhood lamp ground circuit. Does the test lamp illuminate? | Go to Step 6 | Go to Step 5 |
| 5 | Test the underhood lamp voltage supply 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 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the harness connector of the underhood 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 9 | Go to Step 8 |
| 7 | Locate and repair an open or high resistance in the underhood lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 9 | |
| 8 | Replace the underhood lamp. Refer to Underhood Lamp Replacement . 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 3 |
Underhood Lamp 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 | Turn ON the courtesy lamps. Open and close the vanity mirror covers. Do the vanity mirror lamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | 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 5 | Go to Step 4 |
| 4 | Replace the sunshade. Refer to Sunshade Replacement in Interior Trim. 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 |
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 | Cover the sunload sensor assembly. Turn ON the courtesy lamps. Open and close the vanity mirror covers. Do the vanity mirror lamps 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 Courtesy Lamps Inoperative |
| 4 | Disconnect the inoperative 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 6 | Go to Step 5 |
| 5 | 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 9 | Go to Step 7 |
| 6 | 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 9 | Go to Step 8 |
| 7 | 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 9 | |
| 8 | Replace the sunshade. Refer to Sunshade Replacement in Interior Trim. 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 |
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
• Body Control Module Replacement
• Diagnostic Starting Point - Doors
• Brake Warning Indicator Always On
• Sun Load Sensor Replacement
• Turn Signal Multifunction Switch Replacement
• Diagnostic Trouble Code (DTC) List - Vehicle
• Inside Rearview Mirror Replacement
• Sunshade Replacement
• Backup Lamps Always On (Automatic Transmission)
• Backup Lamps Inoperative (Automatic Transmission)
• Console Lamp Always On
• Console Lamp Inoperative
• Courtesy Lamps Always On
• Courtesy Lamps Inoperative
• Daytime Running Lamps (DRL) Inoperative
• Exterior Courtesy Lamp(s) Always On
• Exterior Courtesy Lamp(s) Inoperative
• Fog Lamp Indicator Always On
• Fog Lamp Indicator Inoperative
• Rear Fog Lamp Indicator Always On
• Rear Fog Lamp Indicator Inoperative
• Fog Lamps Always On
• Fog Lamps Inoperative
• Rear Fog Lamps Always On
• Rear Fog Lamps Inoperative
• Hazard Lamps Always On
• Hazard Lamps Inoperative
• Headlamp Low or High Beams Always On
• Headlamps Inoperative - High Beams
• Headlamps Inoperative - Low Beams
• Headlamps Flash to Pass Inoperative
• High Beam Indicator Always On
• High Beam Indicator Inoperative (Standard)
• High Mount Stop Lamp Always On
• Illuminated Entry Lamps Inoperative
• Interior Backlighting Does Not Dim
• Interior Backlighting Inoperative
• Instrument Panel Compartment Lamp Inoperative
• Instrument Panel Compartment Lamp Always On
• License Lamps Inoperative
• Lights On Indicator Always On
• Lights On Indicator Inoperative
• Park Lamps Always On
• Park Lamps Inoperative
• Inside Rearview Mirror Lamp(s) Inoperative
• Turn Signal Lamps and/or Indicators Always On or Flashing
• Turn Signal Lamps and/or Indicators Inoperative
• Underhood Lamp Always On
• Underhood Lamp Inoperative
• Vanity Mirror Lamp(s) Always On
• Vanity Mirror Lamp(s) Inoperative
• Symptoms - Lighting Systems