Lighting System Chevrolet Chevy Express H1500

Fastener Tightening Specifications

Fastener Tightening Specifications

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Backup Lamp - Left (Passenger/Cargo) Connector & Terminal Parts Information

Backup Lamp - Left (Passenger/Cargo) Terminal Identification

Backup Lamp - Right (Passenger/Cargo)

Backup Lamp - Right (Passenger/Cargo) Connector & Terminal Parts Information

Backup Lamp - Right (Passenger/Cargo) Terminal Identification

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Center High Mounted Stop Lamp (CHMSL) (Passenger/Cargo) Connector & Terminal Parts Information

Center High Mounted Stop Lamp (CHMSL) (Passenger/Cargo) Terminal Identification

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Courtesy/Reading Lamp - Front Connector & Terminal Parts Information

Courtesy/Reading Lamp - Front Terminal Identification

Courtesy/Reading Lamp - Middle (Passenger)

Courtesy/Reading Lamp - Middle (Passenger) Connector & Terminal Parts Information

Courtesy/Reading Lamp - Middle (Passenger) Terminal Identification

Courtesy/Reading Lamp - Rear (Passenger)

Courtesy/Reading Lamp - Rear (Passenger) Connector & Terminal Parts Information

Courtesy/Reading Lamp - Rear (Passenger) Terminal Identification

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Dome Fluorescent Work Lamps (PNP w/UF2) Connector & Terminal Parts Information

Dome Fluorescent Work Lamps (PNP w/UF2) Terminal Identification

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Dome Fluorescent Work Lamp Relay (PNP w/UF2) Connector & Terminal Parts Information

Dome Fluorescent Work Lamp Relay (PNP w/UF2) Terminal Identification

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Dome Lamp - Rear (Cargo) Connector & Terminal Parts Information

Dome Lamp - Rear (Cargo) Terminal Identification

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Door Jamb Switch - Left Rear Side (E26) Connector & Terminal Parts Information

Door Jamb Switch - Left Rear Side (E26) Terminal Identification

Door Jamb Switch - Right Rear Side (Passenger/Cargo)

Door Jamb Switch - Right Rear Side (Passenger/Cargo) Connector & Terminal Parts Information

Door Jamb Switch - Right Rear Side (Passenger/Cargo) Terminal Identification

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Door Latch Assembly - Cargo - C1 Connector & Terminal Parts Information

Door Latch Assembly - Cargo - C1 Terminal Identification

Door Latch Assembly - Driver - C1

Door Latch Assembly - Driver - C1 Connector & Terminal Parts Information

Door Latch Assembly - Driver - C1 Terminal Identification

Door Latch Assembly - Passenger - C1

Door Latch Assembly - Passenger - C1 Connector & Terminal Parts Information

Door Latch Assembly - Passenger - C1 Terminal Identification

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Fog Lamp - LR (T79) Connector & Terminal Parts Information

Fog Lamp - LR (T79) Terminal Identification

Fog Lamp - RR (T79)

Fog Lamp - RR (T79) Connector & Terminal Parts Information

Fog Lamp - RR (T79) Terminal Identification

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Headlamp - High Beam - Left (Composite) Connector & Terminal Parts Information

Headlamp - High Beam - Left (Composite) Terminal Identification

Headlamp - High Beam - Right (Composite)

Headlamp - High Beam - Right (Composite) Connector & Terminal Parts Information

Headlamp - High Beam - Right (Composite) Terminal Identification

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Headlamp - Left (Sealed) Connector & Terminal Parts Information

Headlamp - Left (Sealed) Terminal Identification

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Headlamp - Low Beam - Left (Composite) Connector & Terminal Parts Information

Headlamp - Low Beam - Left (Composite) Terminal Identification

Headlamp - Low Beam - Right (Composite)

Headlamp - Low Beam - Right (Composite) Connector & Terminal Parts Information

Headlamp - Low Beam - Right (Composite) Terminal Identification

Headlamp - Right (Sealed)

Headlamp - Right (Sealed) Connector & Terminal Parts Information

Headlamp - Right (Sealed) Terminal Identification

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Headlamp and Panel Dimmer Switch - C1 Connector & Terminal Parts Information

Headlamp and Panel Dimmer Switch - C1 Terminal Identification

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Headlamp and Panel Dimmer Switch - C2 Connector & Terminal Parts Information

Headlamp and Panel Dimmer Switch - C2 Terminal Identification

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License Lamp (Passenger/Cargo) Connector & Terminal Parts Information

License Lamp (Passenger/Cargo) Terminal Identification

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Marker Lamp - Left Front Connector & Terminal Parts Information

Marker Lamp - Left Front Terminal Identification

Marker Lamp - Right Front

Marker Lamp - Right Front Connector & Terminal Parts Information

Marker Lamp - Right Front Connector & Terminal Parts Information

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Park/Turn Signal Lamp - Left Front Connector & Terminal Parts Information

Park/Turn Signal Lamp - Left Front Terminal Identification

Park/Turn Signal Lamp - Right Front

Park/Turn Signal Lamp - Right Front Connector & Terminal Parts Information

Park/Turn Signal Lamp - Right Front Terminal Identification

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Stop Lamp Switch Connector & Terminal Parts Information

Stop Lamp Switch Terminal Identification

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Tail/Stop and Turn Signal Lamp - Left (Passenger/Cargo) Connector & Terminal Parts Information

Tail/Stop and Turn Signal Lamp - Left (Passenger/Cargo) Terminal Identification

Tail/Stop and Turn Signal Lamp - Right (Passenger/Cargo)

Tail/Stop and Turn Signal Lamp - Right (Passenger/Cargo) Connector & Terminal Parts Information

Tail/Stop and Turn Signal Lamp - Right (Passenger/Cargo) Terminal Identification

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Trailer Stop/Turn Relay - Left (UY7) Connector & Terminal Parts Information

Trailer Stop/Turn Relay - Left (UY7) Terminal Identification

Trailer Stop/Turn Relay - Right (UY7)

Trailer Stop/Turn Relay - Right (UY7) Connector & Terminal Parts Information

Trailer Stop/Turn Relay - Right (UY7) Terminal Identification

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Turn Signal/Hazard Flasher Module Connector & Terminal Parts Information

Turn Signal/Hazard Flasher Module Terminal Identification

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Turn Signal/Multifunction Switch - C1 Connector & Terminal Parts Information

Turn Signal/Multifunction Switch - C1 Terminal Identification

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Turn Signal/Multifunction Switch - C2 Connector & Terminal Parts Information

Turn Signal/Multifunction Switch - C2 Terminal Identification

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Turn Signal/Multifunction Switch - C3 Connector & Terminal Parts Information

Turn Signal/Multifunction Switch - C3 Terminal Identification

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Turn Signal/Multifunction Switch - C4 Connector & Terminal Parts Information

Turn Signal/Multifunction Switch - C4 Terminal Identification

Underhood Lamp

Underhood Lamp Connector & Terminal Parts Information

Underhood Lamp Terminal Identification

Vanity Mirror Lamp - Left (DH6)

Vanity Mirror Lamp - Left (DH6) Connector & Terminal Parts Information

Vanity Mirror Lamp - Left (DH6) Terminal Identification

Vanity Mirror Lamp - Right (DH6)

Vanity Mirror Lamp - Right (DH6) Connector & Terminal Parts Information

Vanity Mirror Lamp - Right (DH6) Terminal Identification

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Begin the system diagnosis with the Diagnostic System Check - Vehicle . The Diagnostic System Check will provide the following information

1. The identification of the control module(s) which command the system.
2. The ability of the control module(s) to communicate through the serial data circuit.
3. The identification of any stored diagnostic trouble codes (DTCs) and their status.

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Scan Tool Output Controls

Body Control Module (BCM)

Scan Tool Data List

Body Control Module (BCM)

Instrument Panel Cluster (IPC) Module

Circuit Description

The body control module (BCM) controls the illumination dimming of all of the control switch indicators. The BCM sets the control switch indicator illumination level according to the instrument panel (I/P) dimmer switch signal received when the component is activated and the indicator is ON. The BCM also activates the headlamp on indicator.

Voltage for the LED dimming signal, instrument panel lamps dimming control, as well as the backlight lamps control circuits is from the TBC 3 fuse 16 in the underhood fuse block directly through the BCM to these circuits.

DTC Descriptor

This diagnostic procedure supports the following DTC

DTC B0951 Headlamps On Indicator Circuit

Conditions for Running the DTC

The battery voltage must be between 9.0-16.0 volts.

Conditions for Setting the DTC

1. The headlamp on indicator control circuit is open, shorted to ground, or shorted to battery positive voltage.
2. The LED dimming signal circuit is open, shorted to ground, or shorted to battery positive voltage.
3. The backlight lamps control circuit is shorted to ground.
4. The instrument panel lamps dimming control circuit is shorted to ground.
5. There is a loss of the underhood fuse block TBC 3 battery supply voltage to the BCM for 1 second.

Diagnostic Aids

1. Perform a visual inspection for loose or poor connections at all related components. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/chevy-express-h1500/2003-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor) .
2. A short to ground in the following circuits will cause the TBC 3 fuse to open. The backlight lamps control. The instrument panel lamps dimming control. The LED dimming signal. Battery positive voltage from the underhood fuse block TBC 3 fuse.
3. An open in the TBC 3 fuse will cause the BCM to set the following DTC: B0951 B2610 B2625

Action Taken When the DTC Sets

The headlamps on indicator will remain ON with the headlamps OFF.

The headlamps on indicator will remain OFF with the headlamps ON.

Conditions for Clearing the MIL/DTC

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 9: Determines if it is the headlamp on indicator circuit or the BCM.
2. 10: Determines if it is the headlamp on indicator circuit or the BCM.
3. 15: After replacement of the BCM you must calibrate the new module for proper operation.

DTC B0951

The body control module (BCM) supplies battery positive voltage to the reading lamps, underhood lamp, instrument panel (I/P) compartment lamp, and both visor vanity mirror lamps. In the event that any of these lamps were to remain illuminated for more than 20 minutes with the ignition switch in the OFF position, the BCM will deactivate the inadvertent power supply voltage circuit to prevent a total battery discharge condition.

Voltage for the inadvertent power supply voltage circuit is from the TBC 4 fuse 11 in the underhood fuse block directly through the BCM to this circuit.

This diagnostic procedure supports the following DTC

DTC B1480 Battery Rundown Protection Circuit

The battery voltage must be between 9.0-16.0 volts.

1. The inadvertent power supply voltage circuit to the reading lamps, underhood lamp, I/P compartment lamp, and both visor vanity mirror lamps is shorted to ground for more than 1 second.
2. There is a loss of the instrument panel fuse block TBC 4 battery supply voltage to the BCM for 1 second while one or more of the lamps in the inadvertent power circuit has been activated.

The reading lamps, underhood lamp, I/P compartment lamp, and both visor vanity mirror lamps will not operate.

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

1. Perform a visual inspection for loose or poor connections at all related components. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/chevy-express-h1500/2003-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor) .
2. A short to ground in the inadvertent power supply voltage circuit or the battery positive voltage circuit will cause the TBC 4 fuse to open.

The numbers below refer to the step numbers on the diagnostic table.

1. 3: This step test determines if the problem exists in the wiring or the BCM.
2. 5: After replacement of the BCM you must calibrate the new module for proper operation.

DTC B1480

When the body control module (BCM) senses a request for low beam headlamp illumination, the BCM sends a ground signal to the low beam headlamp relay through the headlamp low beam relay control circuit. The headlamp low beam relay will apply voltage to illuminate the headlamps.

This diagnostic procedure supports the following DTC

DTC B2575 Headlamp Control Circuit

The battery voltage must be between 9-16 volts.

1. When the low beam headlamp relay control circuit is open or shorted to ground
2. When the BCM receives a low beam headlamp ON command and the low beam headlamp relay control circuit is shorted to voltage.
3. When the low beam relay coil side is open or the battery positive voltage to the low beam relay is open

The low beam headlamps will not operate or will remain always on.

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

The numbers below refer to the step numbers on the diagnostic table.

1. 3: This step tests for voltage at the voltage supply side of the headlamp low beam relay.
2. 4: This step verifies that the BCM is providing ground to the headlamp low beam relay.
3. 5: This step tests if ground is constantly being applied to the headlamp low beam relay.
4. 6: This step tests if there is opposing voltage present or an open headlamp low beam relay control circuit.
5. 12: After replacement of the BCM, you must calibrate the new module for proper operation.

DTC B2575

When the body control module (BCM) receives a ground signal from the multifunction high beam or flash to pass (FTP) switch commanding to illuminate the high beam headlamps, the BCM will energize the high beam relay by grounding the high beam relay control circuit.

This diagnostic procedure supports the following DTC

DTC B2580 Headlamp High Beam Control Circuit

The battery voltage must be between 9-16 volts.

1. When the high beam headlamp relay control circuit is open or shorted to ground
2. When the BCM receives a high beam headlamp ON command and the high beam headlamp relay control circuit is shorted to voltage
3. When the high beam relay coil side is open or the battery positive voltage to the high beam relay is open

The high beam headlamps will not operate or will remain always on.

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Listen for an audible click when the high beam relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
2. 3: This step tests for voltage at the coil side of the high beam relay.
3. 4: This step verifies that the BCM is providing ground to the high beam relay.
4. 5: This step tests if ground is constantly being applied to the high beam relay.
5. 6: This step tests if there is opposing voltage present or an open high beam relay control circuit.
6. 12: After replacement of the BCM, you must calibrate the new module for proper operation.

DTC B2580

When the body control module (BCM) receives a ground signal from the headlamp switch commanding to illuminate the park lamps, the BCM will energize the park lamp relay by grounding the park lamp relay control circuit.

This diagnostic procedure supports the following DTC

DTC B2585 Park Lamp Control Circuit

The battery voltage must be between 9-16 volts.

1. When the park lamp relay control circuit is open or shorted to ground.
2. When the BCM receives a park lamp ON command and the park lamp relay control circuit is shorted to voltage.
3. When the park lamp relay coil side is open or the battery positive voltage to the low beam relay is open.

The park lamps will not operate or will remain always on.

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Listen for an audible click when the park lamp relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
2. 3: This step tests for voltage at the coil side of the park lamp relay.
3. 4: This step verifies that the BCM is providing ground to the park lamp relay.
4. 5: This step tests if ground is constantly being applied to the park lamp relay.
5. 6: This step tests if there is opposing voltage present or an open park lamp relay control circuit.
6. 12: After replacement of the BCM, you must calibrate the new module for proper operation.

DTC B2585

The body control module (BCM) signals the turn/hazard flasher module to illuminate the daytime running lamps (DRL) by grounding the DRL low control circuit. The DRL operates when the ignition switch is in the RUN position and the gear selector is not in the park position.

This diagnostic procedure supports the following DTC

DTC B2600 Daytime Running Lamp Control

The battery voltage must be between 9-16 volts.

1. When the BCM sends a DRL OFF command and the DRL low control circuit is shorted to ground
2. When the BCM sends a DRL ON command and the DRL low control circuit is shorted to battery positive voltage or open
3. When the Flasher fuse 15 in the underhood fuse block is open
4. When the following circuits are shorted to ground: Left rear stop/turn lamp supply voltage Right rear stop/turn lamp supply voltage Left DRL/turn supply voltage Right DRL/turn supply voltage Left turn signal indicator lamp supply voltage Right turn signal indicator lamp supply voltage Battery supply voltage from the underhood fuse block Flasher fuse
5. The instrument panel lamps dimming control circuit is shorted to ground.

The DRL will not operate or will remain always ON.

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

1. Perform a visual inspection for loose or poor connections at all related components. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/chevy-express-h1500/2003-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor) .
2. A short to ground in the following circuits will cause the Flasher fuse to open: Left rear stop/turn lamp supply voltage Right rear stop/turn lamp supply voltage Left DRL/turn supply voltage Right DRL/turn supply voltage Left turn signal indicator lamp supply voltage Right turn signal indicator lamp supply voltage Battery supply voltage from the underhood fuse block Flasher fuse
3. An open in the Flasher fuse will cause the DRL, turn signals and the hazard flashers to be inoperative.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: This step test determines if the problem exists in the DRL control/BCM or other circuitry.
2. 3: This step test determines if the problem exists in the wiring or the BCM.
3. 7: This step test determines if the problem exists in the wiring or the BCM.
4. 9: After replacement of the BCM, you must calibrate the new module for proper operation.

DTC B2600

The body control module (BCM) receives a variable voltage signal from the instrument panel (I/P) dimmer switch requesting to illuminate the instrument panel controls illumination lamps to a desired intensity. When this occurs, the BCM directly sends a variable voltage based on the I/P dimmer switch position on the backlight lamps control circuit, instrument panel lamps dimming control circuit, and the LED dimming signal circuit.

Voltage for the backlight lamps control circuit, instrument panel lamps dimming control circuit, and the LED dimming signal circuits is from the TBC 3 fuse 16 in the underhood fuse block directly through the BCM to these circuits.

This diagnostic procedure supports the following DTC

DTC B2610 Passenger Compartment Dimming 1 Circuit

The battery voltage must be between 9-16 volts.

1. The backlight lamps control circuit is open, shorted to ground, or shorted to battery positive voltage.
2. The I/P lamps dimming control circuit is open, shorted to ground, or shorted to battery positive voltage.
3. The LED dimming signal circuit is shorted to ground.
4. There is a loss of the underhood fuse block TBC 3 battery supply voltage to the BCM for 1 second.

The I/P illumination lamps and the controls illumination lamps will not operate or are always ON.

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

1. Perform a visual inspection for loose or poor connections at all related components. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/chevy-express-h1500/2003-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor) .
2. A short to ground in the following circuits will cause the TBC 3 fuse to open: The backlight lamps control The instrument panel lamps dimming control The LED dimming signal Battery positive voltage from the underhood fuse block TBC 3 fuse
3. An open in the TBC 3 fuse will cause the BCM to set the following DTC: B0951 B2610 B2625

The numbers below refer to the step numbers on the diagnostic table.

1. 5: This step test determines if the problem exists in the headlamp switch or the BCM.
2. 10: After replacement of the BCM, you must calibrate the new module for proper operation.

DTC B2610

The body control module (BCM) receives a ground signal from the door jamb or courtesy lamp switches requesting courtesy/dome lamp illumination. When this occurs, the BCM sends a voltage through the courtesy lamp high control circuit to the courtesy lamp relay, illuminating the courtesy/dome lamps.

Voltage for the courtesy lamp high control circuit as well as the backup lamp supply voltage circuit is from the body fuse block TBC 2 fuse directly through the BCM to these circuits.

This diagnostic procedure supports the following DTC

DTC B2615 Passenger Compartment Dimming 2 Circuit

The battery voltage must be between 9-16 volts.

1. When the BCM receives a courtesy lamp illumination request signal and the courtesy lamp high control circuit is shorted to ground
2. When the BCM is not receiving a courtesy lamp illumination request signal and the courtesy lamp high control circuit is open or shorted to voltage
3. When the courtesy lamp relay coil side is open
4. There is a loss of the body fuse block TBC 2 battery supply voltage to the BCM for 1 second.

The courtesy dome lamps will not operate or are always ON.

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

1. Perform a visual inspection for loose or poor connections at all related components. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/chevy-express-h1500/2003-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor) .
2. A short to ground in the following circuits will cause the TBC 2 fuse to open: Courtesy lamp high control Backup lamp supply voltage Battery positive voltage from the body fuse block TBC 2 fuse

The numbers below refer to the step numbers on the diagnostic table.

1. 5: This step tests for an open coil in the courtesy lamp relay.
2. 8: After replacement of the BCM, you must calibrate the new module for proper operation.

DTC B2615 (With YF7)

The body control module (BCM) receives a ground signal from the door jamb, or courtesy lamp switch requesting courtesy/dome lamp illumination. When this occurs, the BCM directly sends a voltage through the courtesy lamp supply voltage circuit illuminating the courtesy/dome lamps.

Voltage for the courtesy lamp supply voltage circuit as well as the backup lamp supply voltage circuit is from the body fuse block TBC 2 fuse directly through the BCM to these circuits.

This diagnostic procedure supports the following DTC

DTC B2615 Passenger Compartment Dimming 2 Circuit

The battery voltage must be between 9-16 volts.

1. When the BCM receives a courtesy lamp illumination request signal and the courtesy lamp supply voltage circuit is shorted to ground
2. When the BCM is not receiving a courtesy lamp illumination request signal and the courtesy lamp supply voltage circuit is open before the first connection after the BCM or shorted to voltage
3. There is a loss of the body fuse block TBC 2 battery supply voltage to the BCM for 1 second.

The courtesy dome lamps will not operate or are always ON.

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

1. Perform a visual inspection for loose or poor connections at all related components. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/chevy-express-h1500/2003-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor) .
2. An open circuit up to the first splice only in the courtesy lamp supply voltage circuit from the BCM, will set the DTC.
3. A short to ground in the following circuits will cause the TBC 2 fuse to open: Courtesy lamp supply voltage Backup lamp supply voltage Battery positive voltage from the body fuse block TBC 2 fuse

The numbers below refer to the step numbers on the diagnostic table.

1. 2: This step determines if the problem is a short to ground in the wiring.
2. 3: This step determines if the problem exists in the wiring or the BCM.
3. 4: This step determines if the problem exists in the wiring or the BCM.
4. 6: After replacement of the BCM, you must calibrate the new module for proper operation.

DTC B2615 (Without YF7)

The body control module (BCM) directly sends a 5-volt reference voltage to the instrument panel (I/P) dimmer switch which is then adjusted based on the I/P dimmer switch position and returned as a low reference and a signal to the BCM. The BCM uses this signal to directly control the desired level of instrument panel illumination lamp intensity.

This diagnostic procedure supports the following DTC

DTC B2620 Display Dimming Pulse Width Modulation (PWM) Input Circuit

The battery voltage must be between 9-16 volts.

1. When the BCM monitors a 5-volt reference circuit voltage of less than 4.5 volts
2. When the BCM monitors a 5-volt reference circuit voltage of greater than 5.5 volts
3. When the BCM monitors a signal voltage of equal or greater than 4.86 volts for more than 1 second

The I/P illumination lamp dimming will not operate.

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

The numbers below refer to the step numbers on the diagnostic table.

1. 3: This step tests for the proper operation of the circuit in the low voltage range.
2. 4: This step tests for the proper operation of the circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.
3. 5: This step tests for a short to battery positive voltage in the 5-volt reference circuit.
4. 6: This step tests for a high resistance or an open in the low reference circuit.

DTC B2620

The body control module (BCM) receives a variable voltage signal from the instrument panel (I/P) dimmer switch requesting to illuminate the dimming lamps to a desired intensity. When this occurs, the BCM directly sends a pulse width modulated (PWM) voltage based on the I/P dimmer switch position on the LED dimming signal circuit, instrument panel lamps dimming control circuit, and the backlight lamps control circuit.

Voltage for the LED dimming signal circuit, instrument panel lamps dimming control circuit, and the backlight lamps control circuit is from the TBC 3 fuse 16 in the underhood fuse block directly through the BCM to these circuits.

This diagnostic procedure supports the following DTC

DTC B2625 Display Dimming Pulse Width Modulation (PWM) Output Circuit

The battery voltage must be between 9-16 volts.

1. The backlight lamps control circuit is shorted to ground.
2. The I/P lamps dimming control circuit is shorted to ground.
3. The LED dimming signal circuit is shorted to ground.
4. There is a loss of the underhood fuse block TBC 3 battery supply voltage to the BCM for 1 second.

The dimming lamps will not operate.

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

1. Perform a visual inspection for loose or poor connections at all related components. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/chevy-express-h1500/2003-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor) .
2. A short to ground in the following circuits will cause the TBC 3 fuse to open. The backlight lamps control. The instrument panel lamps dimming control. The LED dimming signal. Battery positive voltage from the underhood fuse block TBC 3 fuse.
3. An open in the TBC 3 fuse will cause the BCM to set the following DTC: B0951 B2610 B2625

The number below refers to the step number on the diagnostic table.

1. 4: After replacement of the BCM, you must calibrate the new module for proper operation.

DTC B2625

The body control module (BCM) monitors the courtesy lamp switch signal circuit in order to determine when the courtesy/dome lamps should be illuminated. When the BCM senses that the courtesy lamp switch signal circuit is grounded when the switch is activated, the BCM will illuminate the courtesy/dome lamps.

This diagnostic procedure supports the following DTC

DTC B3801 Passenger Compartment Lamp Request Circuit

1. The BCM instrument panel (I/P) dimmer switch reference voltage must be between 4.5-5.5 volts.
2. The battery voltage must be between 9-16 volts.

1. When the I/P dimmer switch signal is greater than 1 volt
2. When the BCM receives a courtesy lamp ON request signal from the courtesy lamp switch

The courtesy/dome lamps will not operate.

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

1. Test the courtesy lamp switch for sticking in the ON position.
2. Perform a visual inspection for loose or poor connections at all related components. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/chevy-express-h1500/2003-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor) .

DTC B3801

The body control module (BCM) monitors the park lamp switch on signal circuit and the headlamp switch headlamps on signal circuit in order to determine when the park lamps and headlamps should be illuminated. When the headlamp switch is turned to PARK, the BCM senses that the park lamp switch signal on circuit is grounded and the headlamps switch headlamps ON signal circuit is open. The BCM will then energize the park lamp relay illuminating the park lamps. When the headlamp switch is turned to HEAD, the BCM senses that the park lamp switch on signal circuit and the headlamp switch headlamps ON signal circuit are grounded. The BCM will then energize the park lamp relay and headlamp low beam relay or high beam relay illuminating the park lamps and headlamps.

This diagnostic procedure supports the following DTC

DTC B3802 Park Lamps Request Circuit

The battery voltage must be between 9-16 volts.

1. When the headlamp switch park lamps on signal circuit is open or has a high resistance
2. When the headlamp switch headlamps on signal circuit is shorted to ground

The park lamps will not operate or the headlamps will illuminate without the park lamps.

1. This DTC will clear on current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.
3. History and current DTCs can be cleared using a scan tool.

DTC B3802

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/chevy-express-h1500/2003-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) , before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to the following: «Exterior Lighting Systems Description and Operation»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system) «Interior Lighting Systems Description and Operation»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system)

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the Lighting System. Refer to «Checking Aftermarket Accessories»(/chevrolet/chevy-express-h1500/2003-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-troubleshooting-diagnosis__checking-aftermarket-accessories) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Backup Lamps Always On»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__backup-lamps-always-on)
2. «Backup Lamps Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__backup-lamps-inoperative)
3. «Courtesy Lamps Always On»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__courtesy-lamps-always-on)
4. «Courtesy Lamps Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__courtesy-lamps-inoperative)
5. «Daytime Running Lamps (DRL) Defeat Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__daytime-running-lamps-drl-defeat-inoperative)
6. «Daytime Running Lamps (DRL) Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__daytime-running-lamps-drl-inoperative)
7. «Dome Lamps Always On»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__dome-lamps-always-on)
8. «Dome Lamps Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__dome-lamps-inoperative)
9. «Hazard Lamps Always On»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__hazard-lamps-always-on)
10. «Hazard Lamps Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__hazard-lamps-inoperative)
11. «Headlamp Low or High Beams Always On»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__headlamp-low-or-high-beams-always)
12. «Headlamps Inoperative - High Beams»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__headlamps-inoperative-high-beams)
13. «Headlamps Inoperative - Low Beams»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__headlamps-inoperative-low-beams)
14. «Low and High Beams Headlamps Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__low-and-high-beams-headlamps-inoperative)
15. «Headlamps Flash to Pass Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__headlamps-flash-to-pass-inoperative)
16. «High Beam Indicator Always On»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__high-beam-indicator-always-on)
17. «High Beam Indicator Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__high-beam-indicator-inoperative)
18. «Interior Backlighting Does Not Dim»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__interior-backlighting-does-not-dim)
19. «Interior Backlighting Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__interior-backlighting-inoperative)
20. «Park, License, and Tail Lamps Always On»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__park-license-and-tail-lamps-always)
21. «Park, License, and Tail Lamps Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__park-license-and-tail-lamps-inoperative)
22. «Reading Lamp(s) Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__reading-lamps-inoperative)
23. «Stop Lamps Always On»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__stop-lamps-always-on)
24. «Stop Lamps Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__stop-lamps-inoperative)
25. «Turn Signal Lamps and/or Indicators Always On or Flashing»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__turn-signal-lamps-andor-indicators-always)
26. «Turn Signal Lamps and/or Indicators Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__turn-signal-lamps-andor-indicators-inoperative)
27. «Underhood Lamp Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__underhood-lamp-inoperative)
28. «Vanity Mirror Lamp(s) Inoperative»(/chevrolet/chevy-express-h1500/2003-2012/remont/exterior-lights/#lighting-system__vanity-mirror-lamps-inoperative)

Backup Lamps Always On

Backup Lamps Always On

Backup Lamps Inoperative

Backup Lamps Inoperative

Courtesy Lamps Always On

Courtesy Lamps Always On

Courtesy Lamps Inoperative

Courtesy Lamps Inoperative

Daytime Running Lamps (DRL) Defeat Inoperative

Daytime Running Lamps (DRL) Defeat Inoperative

Daytime Running Lamps (DRL) Inoperative

Daytime Running Lamps (DRL) Inoperative

Dome Lamps Always On

Dome Lamps Always On

Dome Lamps Inoperative

Dome Lamps Inoperative

Rear Fog Lamp Indicator Inoperative

Rear Fog Lamp Indicator Inoperative

Rear Fog Lamps Always On

Rear Fog Lamps Always On

Rear Fog Lamps Inoperative

Rear Fog Lamps Inoperative

Hazard Lamps Always On

Hazard Lamps Always On

Hazard Lamps Inoperative

Hazard Lamps Inoperative

Headlamp Low or High Beams Always On

Headlamp Low or High Beams Always On

Headlamps Inoperative - High Beams

Headlamps Inoperative - High Beams

Headlamps Inoperative - Low Beams

Headlamps Inoperative - Low Beams

Low and High Beams Headlamps Inoperative

Low and High Beams Headlamps Inoperative

Headlamps Flash to Pass Inoperative

Headlamps Flash to Pass Inoperative

High Beam Indicator Always On

High Beam Indicator Always On

High Beam Indicator Inoperative

High Beam Indicator Inoperative

Interior Backlighting Does Not Dim

Interior Backlighting Does Not Dim

Interior Backlighting Inoperative

Interior Backlighting Inoperative

Park, License, and Tail Lamps Always On

Park, License, and Tail Lamps Always On

Park, License, and Tail Lamps Inoperative

Park, License, and Tail Lamps Inoperative

Reading Lamp(s) Inoperative

Reading Lamp(s) Inoperative

Stop Lamps Always On

Stop Lamps Always On

Stop Lamps Inoperative

Stop Lamps Inoperative

Turn Signal Lamps and/or Indicators Always On or Flashing

Turn Signal Lamps and/or Indicators Always On or Flashing

Turn Signal Lamps and/or Indicators Inoperative

Turn Signal Lamps and/or Indicators Inoperative

Underhood Lamp Inoperative

Underhood Lamp Inoperative

Vanity Mirror Lamp(s) Inoperative

Vanity Mirror Lamp(s) Inoperative

Removal Procedure

1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection»(/chevrolet/chevy-express-h1500/2003-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Disconnect the electrical connector from the stop lamp switch.
3. Remove the retainer from the brake pedal pin.
4. Remove the stop lamp switch and the pushrod to the power brake booster from the brake pedal pin.
5. Unsnap the stop lamp switch from the power brake booster pushrod.

Installation Procedure

1. Snap the stop lamp switch onto the pushrod to the power brake booster.
2. Install the stop lamp switch with the pushrod on the brake pedal pin.
3. Install brake switch retainer.
4. Connect the electrical connector to the stop lamp switch.
5. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection»(/chevrolet/chevy-express-h1500/2003-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Remove the left side knee bolster and bracket. Refer to «Driver Knee Bolster Bracket Replacement»(/chevrolet/chevy-express-h1500/2003-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
2. Position the left side of the instrument panel (I/P) cluster bezel.
3. Disconnect the electrical connector from the headlamp switch.
4. Remove the headlamp switch from the instrument panel cluster trim plate by releasing the retainers on the instrument panel cluster trim plate from the headlamp switch.
5. Remove the headlamp switch from the vehicle.

1. Install the headlamp switch to the vehicle.
2. Connect the headlamp switch to the instrument panel cluster trim plate by pushing on the switch in order to engage the retainers on the instrument panel cluster trim plate.
3. Connect the electrical connector to the headlamp switch.
4. Reposition the left side of the I/P cluster bezel to the fully installed position.
5. Install the left side knee bolster bracket and bolster. Refer to «Driver Knee Bolster Bracket Replacement»(/chevrolet/chevy-express-h1500/2003-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .

1. Pry the bezel from the instrument panel extension using a flat-bladed tool.
2. Remove the electrical connector from the rear fog lamp switch.
3. Press the tabs on the rear fog lamp switch in order to disengage the tabs from the bezel.
4. Remove the rear fog lamp switch from the vehicle.

1. Install the following components to the instrument panel extension: The rear fog lamp switch The bezel
2. Apply pressure to the rear fog lamp switch in order to engage the tabs on the switch to the bezel.
3. Install the rear fog lamp switch.
4. Install the electrical connector to the rear fog lamp switch.
5. Install the bezel to the lower panel extension.

1. Remove the left knee bolster bracket. Refer to «Driver Knee Bolster Bracket Replacement»(/chevrolet/chevy-express-h1500/2003-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
2. Remove the turn/hazard flasher (2) from the instrument panel (I/P) support.
3. Disconnect the electrical connector (1).
4. Remove the turn/hazard flasher (2).

1. Connect the electrical connector (1) to the turn/hazard flasher (2).
2. Install the turn/hazard flasher (2) to the instrument panel (I/P) support.
3. Install the left knee bolster bracket. Refer to «Driver Knee Bolster Bracket Replacement»(/chevrolet/chevy-express-h1500/2003-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .

1. Gently pry out the lens (2) of the vanity mirror assembly (4) with a suitable flat-bladed tool.
2. Remove the bulb (3) from the socket.

1. Install the bulb (3) into the bulb socket.
2. Install the lens (2) to the vanity mirror assembly (4) by pressing it into place.

1. Using a flat bladed tool, pry the dome lamp lens open.
2. Remove the dome lamp lens (2) completely from the dome lamp housing.
3. Partially remove the dome lamp housing (1) from the headliner.
4. Disconnect the electrical connector (2) from the dome lamp housing.

1. Partially install the dome lamp housing (1) to the headliner.
2. Connect the dome lamp electrical connector (2).
3. Install the dome lamp lens (2) to the dome lamp housing.
4. Snap the dome lamp lens (2) into the dome lamp housing.

1. Using a flat bladed tool, pry the dome lamp lens open.
2. Remove the dome lamp bulbs (1) from the dome lamp housing.

1. Install the dome lamp bulbs (1).
2. Snap the dome lamp lens (2) into the housing.

1. Disconnect the electrical connector from the underhood lamp.
2. Drill out the rivets (2) that retain the underhood lamp (1) to the hood.

1. Install the underhood lamp with the retaining rivets (2) to the hood.
2. Connect the electrical connector to the underhood lamp.

1. Turn OFF the headlamp switch.
2. Remove the retaining ring screws from the headlamp. Do not move the adjustment screws.
3. Remove the retaining ring from the headlamp.
4. Remove the headlamp from the housing.
5. Disconnect the electrical connector from the headlamp.

1. Connect the electrical connector to the headlamp.
2. Install the headlamp to the housing.
3. Install the retaining ring to the headlamp.
4. Install the screws to the retaining ring.

1. Turn OFF the headlamp switch.
2. Disconnect the electrical connector from the headlamp bulb.
3. Rotate the bulb counterclockwise in order to disengage the bulb from the headlamp.
4. Remove the bulb from the headlamp.

1. Install the bulb to the headlamp.
2. Rotate the bulb clockwise in order to engage the bulb in the headlamp.
3. Connect the electrical connector to the headlamp bulb.

1. Turn OFF the headlamp switch.
2. Remove the bolts (5) that retain the composite headlamp to the radiator support. Do not move the adjustment screws.
3. Disconnect the electrical connector (1) from the headlamp assembly.
4. Remove the composite headlamp (4) from the vehicle.

1. Connect the electrical connector (1) to the headlamp assembly.
2. Install the composite headlamp (4) to the vehicle.
3. Install the composite headlamp retaining bolts (5) to the radiator support. Tighten: Tighten the bolts to 11 N.m (97 lb in).

Headlamp Aiming

The screen method is preferred for aiming headlamps. If the headlamp is equipped with aiming pads, headlamp aiming may be performed using the alternate procedure.

Headlamp aiming is done with the vehicle's low beam lamps. The high beam lamps will be correctly aimed if the low beam lamps are aimed properly. If the high beam needs adjustment, follow the screen method using the high beam bulb as the reference for measurements.

Screen Method for Headlamp Aiming (Visual Aim)

Headlamp aim should be checked

1. When a new headlamp capsule is installed
2. If service or repairs to the front end area have (or may have) disturbed the headlamps or their mounting

1. The area will consist of a level surface large enough to allow for a vehicle and an additional 7.62 m (25 feet) measured from face of lamps to the front of the aiming screen.
2. The screen will be 1.52 m (5 ft) high x 3.66 m (12 ft) wide with a matte white surface well shaded from extraneous light, and properly adjusted to the floor on which the vehicle stands. Provisions may be made for moving the screen so it can be aligned parallel with the vehicle.
3. The screen shall be provided with a fixed vertical centerline, two laterally adjustable vertical tapes, and one vertically adjustable horizontal tape.
4. If a regular commercial aiming screen is not available, the screen may consist of a vertical wall having a clear uninterrupted area approximately 1.83 m (6 ft) high and 3.66 m (12 ft) wide. The surface should be finished with a washable non-gloss white paint.
5. After the aiming screen has been set up in its permanent location, it is necessary to paint a reference line on the floor directly under the lens of the lamps to indicate the proper location of the headlamps when they are being aimed: Distance between headlamps (1) Center line of screen (2) Adjustable vertical pointer (3) Adjustable horizontal tape (4) Diagram of light screen (5) Vertical center line ahead of right headlamp pointer position (6) 7.62 m (25 ft) (7) Car axis (8) Adjustable vertical pointer Horizontal center line of lamps Vertical center line ahead of left headlamp

Prior to aiming the headlamps, the following steps must be taken

1. Remove any snow, ice or mud from the vehicle.
2. The vehicle must have a full tank of gas.
3. Stop all other work on the vehicle.
4. If any service has been performed on the vehicle, make sure that all of the components are back in their original place.
5. The vehicle must be on a level surface.
6. The vehicle left tires must be aligned with the reference line extending from the screen with the headlamps aligned with the reference line.
7. Do not load any cargo in the vehicle.
8. The vehicle must contain one person or 72.56 kg (160 lb) on the driver's seat.
9. Inflate the tires to the proper pressure.
10. Simulate the vehicle loads if the intended use of the vehicle is for hauling heavy loads or towing a trailer.
11. Rock the vehicle in order to stabilize the suspension.
12. Turn on the headlamps to low beam and observe the left and the top edges of the high intensity zone on the screen. The edges of the high intensity zone should fall within the specifications.

Headlamp Aiming Procedure

1. Open the hood.
2. Measure from the floor to the center of the headlamp bulb. (Some headlamps have an aim dot marked on the headlamp lens).
3. At the screen, measure from the floor and place the horizontal tape at the measured distance.
4. Measure from the reference line on the floor to the left headlamp bulb centerline.
5. At the screen, measure from the reference line and place the vertical tape at the measured distance.
6. Measure from the reference line on the floor to the right headlamp bulb centerline.
7. At the screen, measure from the reference line and place the vertical tape at the measured distance.
8. Turn on the low beam headlamps and block the light from projecting onto the screen from the passenger side headlamp.
9. Adjust the vertical aim of the headlamps to the specifications required by the state and the local authorities, or as shown in step number 8.
10. Rotate the headlamp adjuster (1) to change the vertical aim of the headlamp.
11. Repeat the aiming procedure for the passenger side headlamp while blocking the light from projecting onto the screen from the driver side headlamp.
12. Close the hood.
13. This illustration represents the visual optics left (VOL) pattern.
14. This illustration represents the visual optics right (VOR) pattern.
15. This illustration represents all headlamps, except the VOL and VOR.
16. This illustration represents the high beam pattern for all headlamps, including VOL and VOR.

Alternate Aiming Procedure

Tool Required

Composite Headlight Aimer Adapter

Instructions for use accompany the tool.

This procedure may only be used on headlamps equipped with aiming pads. Adjustment settings are embossed on the headlamp lens. They are typically located near the aiming pads. In some cases, the adjustment settings are located in other areas of the lens. They will be represented by a number followed by the letter V or the letter H.

1. Remove any snow, ice or mud from the vehicle.
2. The vehicle should be fully assembled and all other work stopped while the headlamp aiming is being done.
3. The vehicle should contain cargo or be loaded to represent normal vehicle use.
4. Tires should be properly inflated.
5. Rock the vehicle to stabilize the suspension.
6. Using, adjust the headlamps to the specifications required by state and local authorities.

1. Disconnect the electrical connector from the lamp assembly.
2. Remove the nut retaining the lamp assembly to the bracket.
3. Remove the lamp assembly from the bumper.

1. Install the lamp assembly to the bumper.
2. Install the nut to retain the lamp assembly to the bracket. Tighten: Tighten the nut to 2 N.m (18 in lb).
3. Install the electrical connector to the lamp assembly.

1. Remove the screws retaining the lens to the lamp.
2. Remove the lens from the lamp.
3. Gently push in on the bulb and turn the bulb 1/4 turn counterclockwise.
4. Remove the bulb from the socket.

1. Install the bulb to the socket.
2. Gently push in on the bulb and turn the bulb 1/4 turn clockwise.
3. Install the lens to the lamp assembly.
4. Install the screws to retain the lens to the lamp assembly. Tighten: Tighten the screws to 1.5 N.m (13 lb in).

1. Remove the screws holding the retaining ring to the headlamp housing assembly.
2. Remove the retaining ring from the position lamp.
3. Remove the headlamp capsule (1) from the position lamp.
4. Remove the bulb (4) and socket from the rubber grommet in the lamp capsule.
5. Push in on the side of the bulb (4) and turn the bulb 1/4 turn counterclockwise.
6. Remove the bulb (4) from the socket.

1. Install the bulb (4) to the socket.
2. Push in on the bulb (4) and turn 1/4 turn clockwise.
3. Install the bulb (4) and socket into the rubber grommet in the headlamp capsule (1).
4. Install the headlamp capsule (1) to the headlamp housing.
5. Install the retaining ring to the headlamp housing assembly.
6. Install the screws to the retaining ring to the headlamp housing assembly. Tighten: Tighten the screws to 1.5 N.m (13 lb in).

1. Push the light assembly (2) towards the front of the vehicle while gently prying the rear edge of the light assembly away from the fender with a small flat-bladed tool in order to remove the light assembly.
2. Remove the bulb and socket from the light assembly (3) by turning the socket 1/4 turn counterclockwise.
3. Remove the bulb (1) from the socket.

1. Install the bulb (1) into the socket.
2. Turn the socket (3) 1/4 turn clockwise in order to install the socket into the light assembly.
3. Hook the front tab on the lens into the fender and press the light assembly (2) retaining clip into the fender until fully seated.

1. Remove the screw (4) that retains the front side marker lamp to the radiator grille.
2. Lift the side marker lamp (3) up and out in order to disengage the tab.
3. Disconnect the bulb socket (1) from the side marker lamp.
4. Remove the bulb (1) from the socket.

1. Connect the bulb (1) into the socket.
2. Connect the bulb socket (1) into the side marker lamp.
3. Install the side marker lamp (3) to the radiator grille (5).
4. Install the side marker lamp retaining screw (4). Tighten: Tighten the screws to 1.5 N.m (13 lb in).

1. Remove the screw (4) that retains the side marker or the reflector to the grille.
2. Remove the side marker lamp (3) or the reflector (5) from the grille.
3. Disconnect the bulb socket (2) from the side marker lamp.
4. Remove the bulb (2) from the socket by turning the bulb in a counter clockwise direction.

1. Install the bulb (2) into the socket by turning the bulb in a clockwise direction.
2. Connect the bulb socket (2) into the side marker lamp.
3. Install the side marker lamp (3) or the reflector (5) to the radiator grille (1).
4. Install the side marker lamp or reflector retaining screw (4) to the grille. Tighten: Tighten the screws to 1.5 N.m (13 lb in).

1. Remove the screws (3) from the park/turn signal lamp to the grille.
2. Remove the park/turn signal lamp (2) from the grille.
3. Disconnect the bulb socket (1) from the park/turn signal lamp by turning the bulb sockets in a counterclockwise direction.
4. Remove the bulb (1) from the socket.

1. Install the bulb (1) into the socket by turning the bulb sockets in a clockwise direction.
2. Connect the bulb socket (1) into the park/turn signal lamp.
3. Install the park/turn signal lamp (2) to the grille (5).
4. Install the park/turn signal lamp retaining screws (3) to the grille. Tighten: Tighten the screws to 1.5 N.m (13 lb in).

Scheme 61