Lighting Systems Chevrolet Equinox I

Fastener Tightening Specifications

Fastener Tightening Specifications

Lighting Systems Schematic Icons Icon Icon Definition CAUTION: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling Zones. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs

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Ambient Light Sensor Connector Part Information OEM: 12047662 Service: 12085535 2-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A L-GN/BK 1137 DRL/Ambient Light Sensor Signal B YE/BK 1138 DRL Ambient Light Sensor Low Reference

Backup Lamp - Left Connector Part Information OEM: Stanley Service: N/A 2-Way F Bulb Socket (GY) Pin Wire Color Circuit No. Function A RD 24 Backup Lamps Supply Voltage B BK 850 Ground

Backup Lamp - Right Connector Part Information OEM: Stanley Service: N/A 2-Way F Bulb Socket (GY) Pin Wire Color Circuit No. Function A RD 24 Backup Lamps Supply Voltage B BK 850 Ground

Center High Mounted Stop Lamp (CHMSL) Connector Part Information OEM: 7223-1324 Service: See Catalog 2-Way F (NAT) Pin Wire Color Circuit No. Function 1 L-BU 20 Stop Lamp Switch Signal 2 BK 850 Ground

Courtesy/Map Lamp Connector Part Information OEM: 12047781 Service: 12101864 3-Way F (BK) Pin Wire Color Circuit No. Function A OG 1732 Courtesy Lamps Supply Voltage B BK 750 Ground C - - Not Used

Cruise/Brake Switch Connector Part Information OEM: 12041433 Service: 12126463 2-Way F Metri-Pack 280 Series (BK) Pin Wire Color Circuit No. Function A PK 1339 Ignition 1 Voltage B PU 420 Brake/Cruise Release Switch Signal

Daytime Running Lamp (DRL) Resistor Connector Part Information OEM Assembly: 15300027 OEM Connector Body: 15300008 Service: 12101855 2-Way F Metri-Pack 280 Series Sealed (BK) Pin Wire Color Circuit No. Function A GY 589 DRL Resistor Supply Voltage B BK 150 Ground

Dimmer Switch Connector Part Information OEM: 12020299 Service: 12102566 5-Way F P/C Edgeboard - Standard (NA) Pin Wire Color Circuit No. Function A - - Not Used B BN/WH 230 Instrument Panel Lamps Dimming Control C TN 470 Low Reference D-E - - Not Used

Dome Lamp - Front Connector Part Information OEM: 12045813 Service: 12101889 4-Way F (NA) Pin Wire Color Circuit No. Function A WH 156 Courtesy Lamp Switch Signal B GY 157 Interior Lamp Control C BK 750 Ground D OG 1732 Courtesy Lamps Supply Voltage

Dome Lamp - Rear Connector Part Information OEM: 12045813 Service: 12101889 4-Way F (NA) Pin Wire Color Circuit No. Function A - - Not Used B GY 157 Interior Lamp Control C - - Not Used D OG 1732 Courtesy Lamps Supply Voltage

Fog Lamp - Left (T96) Connector Part Information OEM: 12124819 Service: 12085498 2-Way F Metri-Pack 280 Series (BK) Pin Wire Color Circuit No. Function A PU 34 Front Fog Lamp Supply Voltage B BK 150 Ground

Fog Lamp - Right (T96) Connector Part Information OEM: 12124819 Service: 12085498 2-Way F Metri-Pack 280 Series (BK) Pin Wire Color Circuit No. Function A PU 34 Front Fog Lamp Supply Voltage B BK 150 Ground

Fog Lamp Switch (T96) Connector Part Information OEM: 6098-1779 Service: See Catalog 5-Way F (GN) Pin Wire Color Circuit No. Function A YE 317 Fog Lamp Relay Control B BK 550 Ground C GY 8 Instrument Panel Lamps Supply Voltage D PK 139 Ignition 1 Voltage E OG 192 Front Fog Lamp Switch Signal

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Hazard Switch Connector Part Information OEM: 7183-7201-80 Service: See Catalog 10-Way F (BN) Pin Wire Color Circuit No. Function A PU 1697 Turn Signal Relay Signal B RD/WH 1040 Battery Positive Voltage C L-GN 665 Turn Signal Relay Control D YE 243 Accessory Voltage E D-BU 15 Right Turn Signal Lamp Supply Voltage F-G - - Not Used H L-BU 14 Left Turn Signal Lamp Supply Voltage I GY 8 Instrument Panel Lamps Supply Voltage J BK/WH 151 Signal Ground

Headlamp - Left (Chevrolet) Connector Part Information OEM: 61890112 Service: See Catalog 3-Way F (WH) Pin Wire Color Circuit No. Function 1 D-BU 1201 Headlamp Low Beam Signal 2 RD/WH 740 Battery Positive Voltage 3 PK 1200 Headlamp High Beam Signal

Headlamp - Left (Pontiac) Connector Part Information OEM: 7900-1486-003 Service: See Catalog 3-Way F (WH) Pin Wire Color Circuit No. Function 1 D-BU 1201 Headlamp Low Beam Signal 2 RD/WH 740 Battery Positive Voltage 3 PK 1200 Headlamp High Beam Signal

Headlamp - Right (Chevrolet) Connector Part Information OEM: 61890112 Service: See Catalog 3-Way F (WH) Pin Wire Color Circuit No. Function 1 D-BU 1201 Headlamp Low Beam Signal 2 RD/WH 640 Battery Positive Voltage 3 PK 1200 Headlamp High Beam Signal

Headlamp - Right (Pontiac) Connector Part Information OEM: 7900-1486-003 Service: See Catalog 3-Way F (WH) Pin Wire Color Circuit No. Function 1 D-BU 1201 Headlamp Low Beam Signal 2 RD/WH 640 Battery Positive Voltage 3 PK 1200 Headlamp High Beam Signal

Headlamp Switch Connector Part Information OEM: 929504-3 Service: 15318085 8-Way F (BK) Pin Wire Color Circuit No. Function 1 BK 550 Ground 2 L-BU 14 Left Turn Signal Lamp Supply Voltage 3 GY 691 Headlamp Relay Output 4 PU 1697 Turn Signal Relay Signal 5 D-BU 1201 Headlamp Low Beam Signal 6 D-BU 15 Right Turn Signal Lamp Supply Voltage 7 PK 1200 Headlamp High Beam Signal 8 L-BU 74 Park Lamp Switch Signal

License Lamp - Left Connector Part Information OEM: 15317651 Service: 15306330 2-Way F LP Socket WGE BSE W2 (GY) Pin Wire Color Circuit No. Function A BK 750 Ground B BN 9 Park Lamp Supply Voltage

License Lamp - Right Connector Part Information OEM: 15317651 Service: 15306330 2-Way F LP Socket WGE BSE W2 (GY) Pin Wire Color Circuit No. Function A BK 750 Ground B BN 9 Park Lamp Supply Voltage

Marker Lamp - LF (Chevrolet) Connector Part Information OEM: 7123-5228 Service: See Catalog 2-Way F 250 Housing ET Lock Series (NA) Pin Wire Color Circuit No. Function 1 BN 9 Park Lamp Supply Voltage 2 BK 150 Ground

Marker Lamp - LF (Pontiac) Connector Part Information OEM: E3550 Service: See Catalog 2-Way F 1.5 mm Series (BK) Pin Wire Color Circuit No. Function A BN 9 Park Lamp Supply Voltage B BK 150 Ground

Marker Lamp - LR Connector Part Information OEM: Stanley 140 Service: N/A 2-Way F Bulb Socket (BK) Pin Wire Color Circuit No. Function A RD/BU 9 Park Lamp Supply Voltage B BK 750 Ground

Marker Lamp - RF (Chevrolet) Connector Part Information OEM: 7123-5228 Service: See Catalog 2-Way F 250 Housing ET Lock Series (NAT) Pin Wire Color Circuit No. Function 1 BN 9 Park Lamp Supply Voltage 2 BK 150 Ground

Marker Lamp - RF (Pontiac) Connector Part Information OEM: E3550 Service: See Catalog 2-Way F 1.5 mm Series (BK) Pin Wire Color Circuit No. Function A BN 9 Park Lamp Supply Voltage B BK 150 Ground

Marker Lamp - RR Connector Part Information OEM: Stanley 140 Service: N/A 2-Way F Bulb Socket (BK) Pin Wire Color Circuit No. Function A RD/BU 9 Park Lamp Supply Voltage B BK 850 Ground

Park Lamp - LF (Chevrolet) Connector Part Information OEM: 61890890 Service: See Catalog 2-Way F Series Sealed (BK) Pin Wire Color Circuit No. Function 1 BK 150 Ground 2 BN 9 Park Lamp Supply Voltage

Park Lamp - RF (Chevrolet) Connector Part Information OEM: 61890890 Service: See Catalog 2-Way F Series Sealed (BK) Pin Wire Color Circuit No. Function 1 BK 150 Ground 2 BN 9 Park Lamp Supply Voltage

Park/Stop Lamp - LR Connector Part Information OEM: Stanley 1480 Service: N/A 3-Way F Bulb #3057 Socket (BK) Pin Wire Color Circuit No. Function A RD/BU 20 Stop Lamp Switch Signal B GN/WH 9 Park Lamps Supply Voltage G BK 750 Ground

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Park/Stop Lamp - RR Connector Part Information OEM: Stanley 1480 Service: N/A 3-Way F Bulb #3057 Socket (BK) Pin Wire Color Circuit No. Function A RD/BU 20 Stop Lamp Switch Signal B GN/WH 9 Park Lamps Supply Voltage G BK 850 Ground

Park/Turn Signal Lamp - LF (Pontiac) Connector Part Information OEM: 7900-1493-000 Service: See Catalog 3Way F (BK) Pin Wire Color Circuit No. Function 1 L-BU 14 Left Turn Signal Lamps Supply Voltage 2 BN 9 Park Lamp Supply Voltage 3 BK 150 Ground

Park/Turn Signal Lamp - LR Connector Part Information OEM: Stanley 1500 Service: N/A 3-Way F Bulb #3057 Socket (BK) Pin Wire Color Circuit No. Function A RD/BU 18 Left Turn Signal Supply Voltage B GN 9 Park Lamps Supply Voltage G BK 750 Ground

Park/Turn Signal Lamp - RF (Pontiac) Connector Part Information OEM: 7900-1493-000 Service: See Catalog 3Way F (BK) Pin Wire Color Circuit No. Function 1 D-BU 15 Right Turn Signal Lamps Supply Voltage 2 BN 9 Park Lamp Supply Voltage 3 BK 150 Ground

Park/Turn Signal Lamp - RR Connector Part Information OEM: Stanley 1500 Service: N/A 3-Way F Bulb #3057 Socket (BK) Pin Wire Color Circuit No. Function A RD/BU 19 Right Turn Signal Supply Voltage B GN 9 Park Lamps Supply Voltage G BK 850 Ground

Stop Lamp Switch Connector Part Information OEM: 12033701 Service: See Catalog 2-Way F Metri-Pack 480 Series (GY) Pin Wire Color Circuit No. Function A RD/WH 540 Battery Positive Voltage B L-BU 20 Stop Lamp Switch Signal

Trailer Connector (V92) Connector Part Information OEM: 15A416 Service: Not Serviced 4-Way F (BK) Pin Wire Color Circuit No. Function 1 BK 750 Ground 2 BN 2109 Park Lamp Supply Voltage 3 YE 1618 Left Turn Signal Lamp Supply Voltage 4 D-GN 1619 Right Turn Signal Lamp Supply Voltage

Turn Signal Lamp - LF (Chevrolet) Connector Part Information OEM: 7223-1324-40 Service: See Catalog 2-Way F (GY) Pin Wire Color Circuit No. Function 1 L-BU 14 Left Turn Signal Lamp Supply Voltage 2 BK 150 Ground

Turn Signal Lamp - RF (Chevrolet) Connector Part Information OEM: 7223-1324-40 Service: See Catalog 2-Way F (GY) Pin Wire Color Circuit No. Function 1 D-BU 15 Right Turn Signal Lamp Supply Voltage 2 BK 150 Ground

Turn Signal Relay Connector Part Information OEM: 7125-3152-30 Service: See Catalog 3-Way F (BK) Pin Wire Color Circuit No. Function A L-GN 665 Turn Signal Relay Control B PU 1697 Turn Signal Relay Signal C BK 550 Ground

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DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

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

1. The identification of the control modules which command the system
2. The ability of the control modules 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

Scan Tool Output Controls

Scan Tool Data List

Exterior Lamps

Interior Lamps

Switch Inputs

Scan Tool Data Definitions

Use the Scan Tool Data Display Values and Definitions Information in order to assist in diagnosing vehicle malfunctions. Compare the vehicles actual scan tool data with the typical data display value table information. Use the data information in order to aid in understanding the nature of the problem when the vehicle does not match with the typical data display values.

The scan tool data values were taken from a known good vehicle under the following conditions

1. The ignition switch is in the ON position.
2. The engine is not running.
3. The vehicle is in PARK.

Circuit Description

The courtesy lamp supply voltage circuit is controlled by the body control module (BCM). Should any device controlled by this circuit remain ON after the ignition key is removed, the BCM will turn inadvertent power OFF after 20 minutes to conserve battery energy.

DTC Descriptor

This diagnostic procedure supports the following DTC

DTC B1482 Battery Rundown Protection Circuit Low.

Conditions for Running the DTC

The interior lamps are active.

Conditions for Setting the DTC

Any of the following conditions will set this DTC

1. The courtesy lamp supply voltage circuit is shorted to ground.
2. The battery positive voltage circuit to the BCM from the INT LTS/ONSTAR fuse is open or shorted to ground.

Action Taken When the DTC Sets

Interior lamps are inoperative.

Conditions for Clearing the DTC

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

Diagnostic Aids

If the DTC is a history DTC, the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

DTC B1482

The fog lamp relay is controlled by the body control module (BCM). Battery positive voltage is applied to the relay coil when the headlamp switch is in the headlamps or park lamps ON position. The BCM grounds the fog lamp relay control circuit in order to turn ON the fog lamp relay.

The diagnostic procedure supports the following DTC

DTC B2532 Front Fog Lamps Control Circuit Low.

The ignition switch is in the ON position.

The fog lamp relay control circuit is open or shorted to ground.

1. DTC B2532 is stored in the BCM memory.
2. If the fog lamp relay control circuit is shorted to ground, the fog lamps are always ON.
3. If the fog lamp relay control circuit is open, the fog lamps are inoperative.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

1. The fog lamps will only illuminate under the following conditions: The park lamps or low beam headlamps are ON. The high beam headlamps are OFF. The fog lamp switch is pressed. The ignition switch is in the RUN position.
2. If the DTC is a history DTC, the problem may be intermittent. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor) in Wiring Systems.

Test Description

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

1. 2: Listen for an audible click when the fog lamp relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
2. 3: Tests for voltage at the coil side of the fog lamp relay.
3. 4: Verifies that the body control module is providing ground to the fog lamp relay.
4. 5: Determines if ground is constantly being applied, or there is an open circuit to the fog lamp relay.

DTC B2532

The fog lamp relay is controlled by the body control module (BCM). Battery positive voltage is applied to the relay coil when the headlamp switch is in the headlamps or park lamps ON position. The BCM grounds the fog lamp relay control circuit in order to turn ON the fog lamp relay.

This diagnostic procedure supports the following DTC

DTC B2533 Front Fog Lamps Control Circuit High.

The ignition switch is in the ON position.

All of the following conditions must be met

1. The BCM has received a fog lamp ON request signal from the fog lamp switch.
2. The fog lamp relay control circuit is shorted to battery positive voltage for 250 milliseconds.

The fog lamps are inoperative.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

1. The fog lamps will only illuminate under the following conditions: The park lamps or low beam headlamps are ON. The high beam headlamps are OFF. The fog lamp switch is pressed. The ignition switch is in the RUN position.
2. If the DTC is a history DTC, the problem may be intermittent. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor) in Wiring Systems.

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

1. 2: Listen for an audible click when the fog lamp relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
2. 3: Determines if there is a shorted relay coil or a circuit/BCM malfunction.

DTC B2533

The body control module (BCM) grounds the headlamp relay control circuit when the ambient light sensor senses a dark condition. Voltage is supplied to the headlamp relay when the ignition is in the RUN position.

This diagnostic procedure supports the following DTC

DTC B2575 Headlamp Control Circuit

1. The ignition switch is in the RUN position.
2. The ambient light sensor senses a dark condition.
3. The headlamp switch is in the AUTO position.
4. Transmission gear selectors not in the PARK position.

Any of the following conditions will set this DTC

1. The headlamp relay control circuit is open for 5 seconds.
2. The headlamp relay coil is open.
3. Ignition voltage to the headlamp relay is open.
4. The low beam signal circuit is open between the headlamp switch and the instrument panel (I/P) fuse block.
5. The headlamp relay output circuit is open.
6. The ground is open to the headlamp relay or switch.

The headlamps will not illuminate in the AUTO position.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

1. Turn the ignition switch to the OFF position, cover the ambient light sensor on the instrument panel, wait for 15 seconds and then return the ignition to the ON position. The headlamps should illuminate.
2. If the DTC is a history DTC, the problem may be intermittent. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor) in Wiring Systems.
3. An open in the following circuits may cause DTC B2575: Low beam signal circuit Headlamp relay output circuit Ground to the headlamp switch or relay

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

1. 3: Listen for an audible click when the headlamp relay operates. Command both the ON and OFF states. Repeat the commands, as necessary.
2. 4: Tests for voltage at the coil side of the headlamp relay. The ignition switch supplies voltage to the coil side of the headlamp relay.
3. 5: Verifies that the BCM is providing ground to the headlamp relay.

DTC B2575

The body control module (BCM) energizes the headlamp relay when the ambient light sensor senses a dark condition. Battery positive voltage is supplied to the headlamp relay when the ignition is in the RUN position. The BCM grounds the headlamp relay control circuit in order to activate the relay.

This diagnostic procedure supports the following DTC

DTC B2577 Headlamp Control Circuit Low.

1. The ignition switch is in the RUN position.
2. The ambient light sensor senses a light condition, automatic lamp control (ALC) headlamps OFF.

Either of the following conditions will set this DTC

1. The headlamp relay control circuit is open for 5 seconds.
2. The headlamp relay control circuit is shorted to ground for 5 seconds.

The headlamps will remain illuminated or will not illuminate in ALC mode.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

1. If the headlamp relay control circuit is open, the ALC headlamps will be inoperative.
2. In the headlamp relay control circuit is shorted to ground, the ALC headlamps will be always on.
3. If the DTC is a history DTC, the problem may be intermittent. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor) in Wiring Systems.

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

1. 2: Listen for an audible click when the headlamp relay operates. Command both the ON and OFF states. Repeat the commands, as necessary.
2. 3: Tests for voltage at the coil side of the headlamp relay. The ignition switch supplies battery positive voltage to the coil side of the headlamp relay.
3. 4: Verifies that the BCM is providing ground to the headlamp relay.
4. 5: Tests if ground is constantly being applied to the headlamp relay.

DTC B2577

The body control module (BCM) turns ON the headlamp relay when the ambient light sensor senses a dark condition. Voltage is supplied to the headlamp relay coil side at all times. The BCM grounds the headlamp relay control circuit in order to activate the relay. With the HEADLAMP relay activated ground is supplied to the low or high beam signal circuit depending on the position of the headlamp dimmer switch illuminating the headlamps, and signaling the BCM.

This diagnostic procedure supports the following DTC

DTC B2578 Headlamp Relay Control Circuit High.

1. The ignition switch is in the RUN position.
2. The ambient light sensor senses a dark condition, automatic lamp control (ALC) headlamps ON.

The headlamp relay control circuit is shorted to voltage for 1 second.

The BCM turns OFF the headlamp relay control for the remainder of the ignition cycle.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

1. If the DTC is a history DTC, the problem may be intermittent. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor) in Wiring Systems.
2. Headlamps will remain ON with key OFF until battery runs down.

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

1. 2: Listen for an audible click when the headlamp relay operates. Command both the ON and OFF states. Repeat the commands, as necessary.

DTC B2578

The body control module (BCM) turns ON the park lamp relay when the ambient light sensor senses a dark condition. Battery positive voltage is supplied to the park lamp relay at all times through the PARK fuse. The BCM grounds the park lamp relay control circuit in order to activate the relay. With the park lamp relay activated voltage is supplied to the park lamp supply voltage circuit illuminating the park lamps, license lamps, marker lamps, and signaling the BCM.

This diagnostic procedure supports the following DTC

DTC B2585 Park Lamp Circuit

1. The ignition switch is in the RUN position.
2. The ambient light sensor senses a dark condition, automatic lamp control (ALC) park lamps ON, or the headlamp switch is in the park or head ON position.

Any of the following conditions will set this DTC

1. The park lamp relay control circuit is open.
2. The park lamp supply voltage circuit is open between the instrument panel (I/P) fuse block and the BCM for 5 seconds.
3. The park lamp supply voltage circuit is shorted to ground.
4. The park lamp relay is stuck in the OPEN position.

1. The park lamps will operate properly if the park lamp supply voltage circuit is open between the I/P fuse block and the BCM.
2. The park lamps will not illuminate if relay is stuck open or the PARK fuse in the I/P fuse block is open.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

If the DTC is a history DTC, the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

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: Tests for voltage at the coil side of the park lamp relay. The PARK fuse supplies battery positive voltage to the coil side of the park lamp relay.
3. 4: Verifies that the BCM is providing ground to the park lamp relay.

DTC B2585

The body control module (BCM) turns ON the park lamp relay when the ambient light sensor senses a dark condition. Battery positive voltage is supplied to the park lamp relay at all times through the PARK fuse. The BCM grounds the park lamp relay control circuit in order to activate the relay.

This diagnostic procedure supports the following DTC

DTC B2587 Park Lamp Control Circuit Low

1. The ignition switch is in the RUN position.
2. The headlamp switch is in the AUTO position.
3. The ambient light sensor senses a light condition, automatic lamp control (ALC) is commanding the park lamps OFF.

The following condition will set this DTC

The park lamp relay control circuit is shorted to ground or open for 5 seconds.

1. The park lamps will remain illuminated if shorted to ground.
2. The park lamps will not illuminate if open.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

If the DTC is a history DTC, the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

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: Tests for voltage at the coil side of the park lamp relay. The PARK fuse supplies battery positive voltage to the coil side of the park lamp relay.

DTC B2587

The body control module (BCM) turns ON the park lamp relay when the ambient light sensor senses a dark condition. Battery positive voltage is supplied to the park lamp relay at all times through the PARK fuse. The BCM grounds the park lamp relay control circuit in order to activate the relay.

This diagnostic procedure supports the following DTC

DTC B2588 Park Lamp Relay Control Circuit High

1. The ignition switch is in the RUN position.
2. The headlamp switch is in the PARK or HEAD ON position.

The following condition will set this DTC

The park lamp relay control circuit is shorted to voltage for 1 second.

The BCM turns off the park lamp relay control circuit for the remainder of the ignition cycle.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

If the DTC is a history DTC, the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

The number below refers to the step number 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.

DTC B2588

The daytime running lamps (DRL) are controlled by the body control module (BCM). The BCM grounds the DRL relay control circuit in order to energize the DRL relay coil. This action provides a path to ground for the RH and LH headlamps through the DRL relay and the DRL resistor. The DRL resistor reduces the intensity of the low beam headlamps for DRL operation. The BCM monitors the low beam circuit to ensure that the DRL are operating properly.

This diagnostic procedure supports the following DTC

DTC B2600 Daytime Running Lamp Control Circuit

Conditions for Running the DTCs

1. The ignition switch is in the RUN position.
2. The headlamp switch is in the AUTO position.
3. The park brake is not applied.
4. The gear selector is not in the PARK position.

Any of the following conditions will set this DTC

1. The DRL resistor supply voltage circuit is open, or shorted to ground.
2. The headlamp low beam signal circuit between a headlamp and the underhood fuse block is open or shorted to ground.
3. The battery positive voltage circuit to the headlamp is open or shorted to ground.
4. One of the headlamp fuses in the underhood fuse block are open.
5. The DRL resistor ground circuit is open.
6. The DRL resistor is open or shorted.
7. The DRL relay is stuck in the OPEN position.

The BCM turns off the DRL relay control for the remainder of the ignition cycle.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction-free ignition cycles.

1. Check both the LH and RH headlamps for proper operation.
2. Check both the LT HDLP and RT HDLP fuses.
3. If the DTC is a history DTC, the problem may be intermittent. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor) in Wiring Systems.

DTC B2600

The daytime running lights (DRL) relay is controlled by the body control module (BCM). Battery positive voltage is applied to the relay coil at all times. The BCM grounds the DRL relay control circuit in order to turn ON the DRL relay.

This diagnostic procedure supports the following DTC

DTC B2602 Daytime Running Lamp Circuit Low

1. The ignition switch is in the RUN position.
2. The headlamp switch is in the AUTO position.
3. The park brake is not applied.
4. The gear selector is not in the PARK position.

All of the following conditions must be met

1. The BCM is not commanding the DRL relay ON.
2. The DRL relay control circuit is open or shorted to ground, or the DRL relay coil is open, or battery positive voltage to the DRL relay is open.

The BCM disables the DRL relay control as long as the malfunction is present.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

1. The park brake must not be set and the transaxle must be in gear for the DRL to operate properly.
2. If the DTC is a history DTC, the problem may be intermittent. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor) in Wiring Systems.

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

1. 2: Listen for an audible click when the DRL relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
2. 3: Tests for voltage at the coil side of the DRL relay.
3. 4: Verifies that the body control module is providing ground to the DRL relay.
4. 5: Tests if ground is constantly being applied to the DRL relay.

DTC B2602

The daytime running lights (DRL) relay is controlled by the body control module (BCM). Battery positive voltage is applied to the relay coil at all times. The BCM grounds the DRL relay control circuit in order to turn ON the DRL relay.

This diagnostic procedure supports the following DTC

DTC B2603 Daytime Running Lamp Circuit High

The ignition switch is in the RUN position.

All of the following conditions must be met

1. The BCM is commanding the DRL relay ON.
2. The DRL relay control circuit is shorted to voltage.

The BCM disables the DRL relay control as long as the malfunction is present.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

1. The park brake must not be set and the transaxle must be in gear for the DRL to operate properly.
2. If the DTC is a history DTC, the problem may be intermittent. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor) in Wiring Systems.

DTC B2603

The body control module (BCM) supplies a reference voltage to the instrument panel dimmer switch through the instrument panel (I/P) lamps dimmer control circuit. The dimmer switch varies the voltage and returns the new voltage to the BCM through the low reference circuit. The BCM uses this voltage to determine the illumination level of the I/P lamps.

This diagnostic procedure supports the following DTC

DTC B2622 Display Dimming Pulse Width Modulation (PWM) Input Circuit Low

The park lamp input to the BCM is active, park or headlamps ON.

Any of the following conditions will set this DTC

1. The I/P lamps dimmer control circuit is shorted to ground.
2. The low reference circuit is shorted to ground.

The illumination of the I/P lamps defaults at full intensity.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

If the DTC is a history DTC, the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

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

1. 2: The normal operating voltage of the I/P dimmer switch is 0.4-4.5 volts.
2. 3: This step determines if there is a problem with the dimmer switch.

DTC B2622

The body control module (BCM) supplies a reference voltage to the instrument panel (I/P) dimmer switch through the I/P lamps dimmer control circuit. The dimmer switch varies the voltage and returns the new voltage to the BCM through the low reference circuit. The BCM uses this voltage to determine the illumination level of the I/P lamps.

This diagnostic procedure supports the following DTC

DTC B2623 Display Dimming Pulse Width Modulation (PWM) Input Circuit High

The park lamp input to the BCM is active, park or headlamps ON.

Any of the following conditions will set this DTC

1. The I/P lamps dimmer control is open or shorted to voltage.
2. The low reference is open or shorted to voltage.

The illumination of the I/P lamps is forced to full intensity.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

1. If the DTC is a history DTC, the problem may be intermittent. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor) in Wiring Systems.
2. A short to voltage may damage the instrument panel dimmer switch.

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

1. 2: The normal operating voltage of the I/P dimmer switch is 0.4-4.5 volts.
2. 3: This step determines if there is a problem with the dimmer switch.

DTC B2623

The body control module (BCM) receives a variable voltage from the instrument panel (I/P) lamp dimmer switch. The BCM uses this signal in order to vary the illumination level of the I/P lamps. The I/P dimming lamps output from the BCM is a pulse width modulated voltage supply used to light the I/P lamps.

This diagnostic procedure supports the following DTC

DTC B2627 Display Dimming Pulse Width Modulation (PWM) Output Circuit Low

The park lamp input is active, park or headlamps ON.

The following conditions will set this DTC

The I/P dimming lamps output is open or shorted to ground.

The I/P lamps will be inoperative.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

If the DTC is a history DTC, the malfunction may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

DTC B2627

The body control module (BCM) receives a variable voltage from the instrument panel (I/P) lamp dimmer switch. The BCM uses this signal in order to vary the illumination level of the I/P lamps. The I/P dimming lamps output from the BCM is a pulse width modulated voltage supply used to light the I/P lamps.

This diagnostic procedure supports the following DTC

DTC B2628 Display Dimming Pulse Width Modulation (PWM) Output Circuit High

The park lamp input is inactive, park and headlamps OFF.

The following condition will set this DTC

The I/P dimming lamps output is shorted to voltage.

If the I/P dimming lamps output is shorted to voltage, the I/P lamps will illuminate at full intensity.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

If the DTC is a history DTC, the malfunction may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

DTC B2628

The ambient light sensor indicates the light level to control the automatic headlamps and park lamps. The body control module (BCM) provides a 5-volt reference signal to the light sensor. The BCM receives the modified voltage from the ambient light sensor through the ambient light sensor low reference circuit. A low voltage under 1.5 volts, signals a dark condition to the BCM and vice versa.

This diagnostic procedure supports the following DTC

DTC B2647 Ambient Light Sensor Circuit Low

The ignition switch is in the RUN position.

The daytime running lamps (DRL)/ambient light sensor signal circuit is shorted to ground for 5 seconds.

The DRL and indicator will not illuminate.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

If the DTC is a history DTC, the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

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

1. 2: The normal operating voltage of the ambient light sensor, photocell, is 0.5-4.5 volts.
2. 3: This step determines if there is a problem with the signal circuit of the ambient light sensor.

DTC B2647

The PARK fuse in the fuse block - instrument panel (I/P) supplies voltage to the switch input side of the park lamp relay. The body control module (BCM) controls the park lamp relay, closing the contacts, applying voltage to the park lamp supply voltage circuit. The park lamps are illuminated any time the headlamp switch is in the park lamps ON or headlamps ON position, or anytime the BCM illuminates the headlamps.

The BCM monitors the park lamp supply voltage circuit to determine if the park lamps are receiving voltage when requested. When the BCM is commanding the headlamps ON and is not receiving voltage on the park lamps supply voltage circuit input the DTC will set.

This diagnostic procedure supports the following DTC

DTC B2662 Park Lamp Switch Circuit Malfunction

1. The ignition switch is in the ON position.
2. The low beam or high beam headlamps are ON.

Any of the following conditions will set this DTC

1. The park lamp supply voltage circuit is open or shorted to ground.
2. The park lamp relay is inoperative.
3. Battery positive voltage to the park lamp relay is open.

DTC B2662 is stored in the BCM memory.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC clears after 100 malfunction free ignition cycles.

1. The low or high beam headlamps must be ON in order to set this DTC.
2. An open PARK fuse will set this code.
3. If the DTC is a history DTC, the problem may be intermittent. Refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor) in Wiring Systems.

DTC B2662

The fog lamp switch is a momentary switch and receives voltage on from the IGN 1 fuse in the instrument panel (I/P) fuse block. The body control module (BCM) monitors the switch on the front fog lamp switch signal circuit. When the switch is pressed voltage is supplied on the front fog lamp signal circuit only while the switch is held down.

This diagnostic procedure supports the following DTC

DTC B2743 Fog Lamp Switch Circuit High

1. The ignition switch is in the RUN position.
2. The headlamp switch is in the headlamps ON or park lamps ON position.
3. The fog lamps are commanded ON.

Any of the following conditions will set this DTC

1. The front fog lamp signal circuit is shorted to voltage for 30 seconds.
2. The fog lamp switch sticks closed.

DTC B2743 is stored in the BCM memory.

1. The BCM receives the clear code command from the scan tool.
2. A current DTC will clear when the conditions for setting the DTC are no longer present.
3. A history DTC will clear after 100 malfunction cycles.

If the DTC is a history DTC, the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

DTC B2743

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/equinox/i-2004-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information 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/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems) «Interior Lighting Systems Description and Operation»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems)

Visual/Physical Inspection

Several of the symptom procedures ask for a careful visual/physical check. This step is extremely important-it could lead to correcting a problem without further checks and can save valuable time. These checks include the following

1. Inspect for aftermarket devices which could affect the operation of the Lighting System. Refer to «Checking Aftermarket Accessories»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__checking-aftermarket-accessories) in Wiring Systems.
2. Inspect the easily accessible or visible system components and harness connectors for obvious damage or conditions which could cause the symptom.
3. If only one lamp is inoperative, inspect and repair a poor connection or an open in the power feed or ground circuit before replacing the light bulb. Refer to «Circuit Testing»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing) and «Wiring Repairs»(/chevrolet/equinox/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs) in Wiring Systems.

Intermittent

Faulty electrical connections or wiring may also be the cause of intermittent conditions. 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 a symptom that does not set a DTC

1. «Backup Lamps Always On»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__backup-lamps-always-on)
2. «Backup Lamps Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__backup-lamps-inoperative)
3. «Courtesy Lamps Always On»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__courtesy-lamps-always-on)
4. «Courtesy Lamps Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__courtesy-lamps-inoperative)
5. «Daytime Running Lamps (DRL) Indicator Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__daytime-running-lamps-drl-indicator-inoperative)
6. «Daytime Running Lamps (DRL) Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__daytime-running-lamps-drl-inoperative)
7. «Fog Lamp Indicator Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__fog-lamp-indicator-inoperative)
8. «Fog Lamps Always On»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__fog-lamps-always-on)
9. «Fog Lamps Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__fog-lamps-inoperative)
10. «Hazard Lamps Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__hazard-lamps-inoperative)
11. «Headlamps Always On - Low or High Beam»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__headlamps-always-on-low-or)
12. «Headlamps Inoperative - High Beams»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__headlamps-inoperative-high-beams)
13. «Headlamps Inoperative - Low Beams»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__headlamps-inoperative-low-beams)
14. «Headlamps Inoperative - Low and High Beams»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__headlamps-inoperative-low-and-high)
15. «Headlamps Inoperative - Flash to Pass»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__headlamps-inoperative-flash-to-pass)
16. «High Beam Indicator Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__high-beam-indicator-inoperative)
17. «Illuminated Entry Lamps Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__illuminated-entry-lamps-inoperative)
18. «Interior Backlighting Does Not Dim»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__interior-backlighting-does-not-dim)
19. «Interior Backlighting Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__interior-backlighting-inoperative)
20. «Park Lamps Always On»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__park-lamps-always-on)
21. «Park Lamps Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__park-lamps-inoperative)
22. «Reading Lamp(s) Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__reading-lamps-inoperative)
23. «Stop Lamps Always On»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__stop-lamps-always-on)
24. «Stop Lamps Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__stop-lamps-inoperative)
25. «Turn Signal Lamps and/or Indicators Always On or Flashing»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__turn-signal-lamps-andor-indicators-always)
26. «Turn Signal Lamps and/or Indicators Inoperative»(/chevrolet/equinox/i-2004-2009/remont/exterior-lights/#lighting-systems__turn-signal-lamps-andor-indicators-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) Indicator Inoperative

Daytime Running Lamps (DRL) Indicator Inoperative

Daytime Running Lamps (DRL) Inoperative

Daytime Running Lamps (DRL) Inoperative

Fog Lamp Indicator Inoperative

Fog Lamp Indicator Inoperative

Fog Lamps Always On

Fog Lamps Always On

Fog Lamps Inoperative

Fog Lamps Inoperative

Hazard Lamps Inoperative

Hazard Lamps Inoperative

Headlamps Always On - Low or High Beam

Headlamps Always On - Low or High Beam

Headlamps Inoperative - High Beams

Headlamps Inoperative - High Beams

Headlamps Inoperative - Low Beams

Headlamps Inoperative - Low Beams

Headlamps Inoperative - Low and High Beams

Headlamps Inoperative - Low and High Beams

Headlamps Inoperative - Flash to Pass

Headlamps Inoperative - Flash to Pass

High Beam Indicator Inoperative

High Beam Indicator Inoperative

Illuminated Entry Lamps Inoperative

Illuminated Entry Lamps Inoperative

Interior Backlighting Does Not Dim

Interior Backlighting Does Not Dim

Interior Backlighting Inoperative

Interior Backlighting Inoperative

Park Lamps Always On

Park Lamps Always On

Park Lamps Inoperative

Park 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

Adjustment Procedure

1. Disconnect the electrical connector from the stop lamp switch.
2. Rotate the switch counterclockwise and remove the switch from the switch retainer.
3. Install the switch to the bracket by turning and pushing the switch until the switch bottoms on the brake pedal.
4. Connect the electrical connector to the stop lamp switch.
5. Inspect the stop lamps for proper operation

Removal Procedure

1. Disconnect the electrical connectors from the stop lamp switch.
2. Rotate the stop lamp switch counterclockwise and remove the switch from the switch retainer.
3. Gently compress the locking tabs on the switch retainer and remove the switch retainer from the brake pedal assembly.

Installation Procedure

1. Connect the electrical connectors on the stop lamp switch.
2. Install the switch to the bracket by turning and pushing the switch until the switch bottoms on the brake pedal.
3. Inspect the stop lamps for proper operation

1. Remove the instrument panel (I/P) trim bezel from the center stack. Refer to «Trim Bezel Replacement - Center»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
2. Remove the screw that retains the center air deflector assembly to the I/P trim bezel. Remove the air deflector assembly.
3. Use a flat-bladed tool to release the fasteners on the fog lamp switch.
4. Disconnect the electrical connector and remove the fog lamp switch.

1. Align the fog lamp switch with the center air deflector assembly and snap into place.
2. Install the center air deflector assembly to the I/P trim bezel. Tighten: Tighten the screw to 2.5 N.m (22 lb in).
3. Connect the electrical connector to the fog lamp switch.
4. Install the I/P trim bezel. Refer to «Trim Bezel Replacement - Center»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
5. Test the fog lamp switch for proper operation.

1. Remove the left side air deflector from the instrument panel (I/P). Refer to «Air Outlet Replacement - Instrument Panel»(/chevrolet/equinox/i-2004-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) in Heating, Ventilation and Air Conditioning.
2. Disconnect the electrical connector from the dimmer switch.
3. Remove the screw from the I/P dimmer switch.
4. Remove the switch.

1. Install the dimmer switch to the left side air deflector panel. Tighten: Tighten the screw to 2.5 N.m (22 lb in).
2. Install the electrical connector to the dimmer switch.
3. Install the left side air deflector panel to the I/P. Refer to «Air Outlet Replacement - Instrument Panel»(/chevrolet/equinox/i-2004-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) in Heating, Ventilation and Air Conditioning
4. Test the dimmer switch for proper operation.

1. Remove the access panel covers from the upper trim pad.
2. Remove the I/P cluster trim panel. Refer to «Trim Panel Replacement - Instrument Panel (I/P) Cluster»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
3. Remove the windshield garnish moldings. Refer to «Windshield Upper Garnish Molding Replacement»(/chevrolet/equinox/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
4. Remove the upper trim pad bolts.
5. Lift the upper trim pad to disengage the clips.
6. Twist the ambient light sensor to remove the sensor from the upper trim pad.
7. Disconnect the electrical connector from the ambient light sensor.

1. Connect the electrical connector to the ambient light sensor.
2. Align the sensor to the upper trim pad and twist into place.
3. Align the upper trim pad to the I/P and fasten the bolts in place. Tighten: Tighten the bolts to 10 N.m (89 lb in).
4. Install the windshield garnish moldings. Refer to «Windshield Upper Garnish Molding Replacement»(/chevrolet/equinox/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
5. Install the I/P cluster trim panel. Refer to «Trim Panel Replacement - Instrument Panel (I/P) Cluster»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
6. Install the access panel covers to the upper trim pad.
7. Test the ambient light sensor for proper operation.

1. Remove the instrument panel (I/P) center trim bezel. Refer to «Trim Bezel Replacement - Center»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
2. Remove the screws that retain the hazard and turn signal flasher switch to the I/P center stack. Remove the switch.
3. Disconnect the electrical connector from the hazard and turn signal flasher switch.

1. Align the switch with the trim bezel and fasten in place. Tighten: Tighten the screw to 2.5 N.m (22 lb in).
2. Connect the electrical connector to the hazard and turn signal flasher switch.
3. Install the I/P center trim bezel. Refer to «Trim Bezel Replacement - Center»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
4. Test the flasher switch for proper operation.

1. Insert a small flat-bladed tool at the front of the reading lamp. Disengage the reading lamp.
2. Pull the reading lamp down.
3. Remove the bulb.

1. Install the reading lamp bulb.
2. Install the reading lamp cover, beginning with the back of the cover.
3. Push the front of the lamp cover up until seated.

1. Remove the windshield upper garnish molding. Refer to «Windshield Upper Garnish Molding Replacement»(/chevrolet/equinox/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
2. Unsnap the sunshade from the inner retainer clips.
3. Remove the sunshade fasteners and remove the sunshade assemblies.
4. Remove the inner retainer fasteners and remove the retainers.
5. If the vehicle is equipped with a sunroof, use a flat-bladed tool to remove the sunroof switch knob.
6. Pull gently at the front of the reading lamp cover to disengage the retainer clips.
7. If the vehicle is equipped with OnStar®, remove the microphone. Refer to «OnStar Microphone Replacement»(/chevrolet/equinox/i-2004-2009/remont/entertainment-systems/#cellular-communication-systems) in Cellular Communication.
8. Rotate the cover rearward until the rear attaching hooks are released.
9. If the vehicle is equipped with a sunroof or with OnStar®, disconnect the electrical connectors.
10. Remove the cover.
11. Disconnect the electrical connector from the forward reading lamp.
12. Pull the headliner down slightly and slide the forward reading lamp out of the headliner.

1. Pull the headliner down slightly and slide the forward reading lamp into place.
2. Connect the electrical connector to the reading lamp.
3. If the vehicle is equipped with OnStar®, install the microphone. Refer to «OnStar Microphone Replacement»(/chevrolet/equinox/i-2004-2009/remont/entertainment-systems/#cellular-communication-systems) in Cellular Communication.
4. Position the forward reading lamp cover into the rear attaching hooks.
5. If the vehicle is equipped with a sunroof or with OnStar®, connect the electrical connectors.
6. Rotate the front reading lamp cover forward into the lamp assembly. Snap the cover into place.
7. If the vehicle is equipped with a sunroof, install the sunroof switch knob.
8. Install the sunshade retainers. Tighten: Tighten the retainer fasteners to 2.5 N.m (22 lb in).
9. Position the sunshade outer brackets to the headliner.
10. Install the sunshades. Tighten: Tighten the sunshade fasteners to 2.5 N.m (22 lb in).
11. Install the windshield upper garnish molding. Refer to «Windshield Upper Garnish Molding Replacement»(/chevrolet/equinox/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.

1. Remove the instrument panel (I/P) trim bezel. Refer to «Trim Bezel Replacement - Center»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
2. Disconnect the electrical connector from the PRNDL assembly.
3. Remove the screws that retain the PRNDL assembly to the I/P bezel. Remove the PRNDL assembly.

1. Align the PRNDL assembly with the trim bezel and fasten in place. Tighten: Tighten the screws to 2.5 N.m (22 lb in).
2. Connect the electrical connector to the PRNDL assembly.
3. Install the I/P trim bezel. Refer to «Trim Bezel Replacement - Center»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
4. Test the PRNDL assembly for proper operation.

1. Using a flat-bladed tool, remove the lamp lens from the dome lamp assembly.
2. Using a small flat-bladed tool, disengage the dome lamp attaching clips by gently prying at each side of the retaining tab while pulling the tab off of the headliner.
3. Pull the forward edge of the dome lamp downward and rearward to disengage the lamp from the headliner.
4. Disconnect the dome lamp electrical connector.
5. Remove the dome lamp.

1. Position the dome lamp to the headliner. Connect the dome lamp electrical harness.
2. Slide the dome lamp into place.
3. Snap the dome lamp clips into the closed position.
4. Snap the lens into the dome lamp assembly.

1. Remove the cover from the dome lamp/cargo lamp.
2. Remove the bulb from the lamp.

1. Install a new bulb to the lamp.
2. Install the cover to the lamp.

1. Open the hood.
2. Remove the fascia to tie bar push-in retainers (1).
3. Gently pull the top of the fascia assembly several inches away from the vehicle to release the radiator grille strap from the headlamp.
4. Place a piece of tape over the radiator grille strap to headlamp retaining clip to prevent scratching of the headlamp lens.
5. Remove the headlamp bolts (1, 2).
6. Pull gently on the bottom outboard corner of the headlamp to disengage the lower rear headlamp retainer.
7. Remove the bulbs (2, 3, 4, 5) from the backside of the headlamp.
8. Remove the headlamp from the vehicle.

1. Position the headlamp into the headlamp opening.
2. Install the headlamp bulbs (2, 3, 4, 5).
3. Push the headlamp back into position until the lower rear retainer is fully engaged.
4. Install the headlamp bolts (1, 2) Tighten: Tighten the headlamp bolts to 2.5 N.m (22 lb in).
5. Remove the tape from the radiator grille strap retainer.
6. Position the fascia assembly and engage the radiator grille strap retainer into the headlamp.
7. Install the fascia to tie bar push-in retainers (1).
8. Close the hood.

Scheme 19

Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement (Torrent)

Scheme 20

Headlamp Bulb Replacement

Aiming Headlamps (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 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.

1. Remove the push-in retainers (1) that hold the front flap of the front wheelhouse liner to the fascia.
2. Bend the front flap of the wheelhouse liner out of the way in order to gain access to the fog lamp.
3. Turn the fog lamp socket (1) counterclockwise to release the fog lamp socket from the fog lamp housing.
4. If replacing the fog lamp bulb, remove the fog lamp bulb from the socket.
5. Remove the 2 lower screws (2) from the rear of the fog lamp housing.
6. Remove the front fog lamp adjuster screw (1), count the number of turns when removing for installation purposes.
7. Remove the fog lamp housing from the fascia.

1. Position the fog lamp housing to the front fascia.
2. Install the front fog lamp adjuster screw (1), turn the screw in the number of turns from documented during removal.
3. Install the 2 lower screws (2) from the rear of the fog lamp housing. Tighten: Tighten the screws to 2 N.m (18 lb in).
4. Install the fog lamp bulb into the socket, if needed.
5. Install the fog lamp bulb socket (1) into the housing.
6. Position the front flap of the wheelhouse liner back into place.
7. Install the wheelhouse liner push-in retainers (1).

Scheme 21

Fog Lamp Replacement - Front (Torrent)

1. Remove the push-in retainers (1) that hold the front flap of the front wheelhouse liner to the fascia.
2. Bend the front flap of the wheelhouse liner out of the way to gain access to the fog lamp.
3. Turn the fog lamp socket (1) counterclockwise in order to release the fog lamp socket from the fog lamp housing.
4. Remove the bulb from the socket.

1. Install the fog lamp bulb into the socket.
2. Install the fog lamp bulb socket (1) into the housing.
3. Position the front flap of the wheelhouse liner back into place.
4. Install the wheelhouse liner push-in retainers (1).

Scheme 22

Fog Lamp Bulb Replacement - Front (Torrent)

Fog Lamp Aiming Procedure

The front fog lamps must be aimed for proper illumination of the road. The front fog lamp aim should be checked when a new front fog lamp assembly is installed, or if service or repairs in the front end area may have disturbed the front fog lamp mounting.

Preparation Procedure

1. Completely assemble all of the components on the vehicle.
2. Place the vehicle on a level surface.
3. Stop all unnecessary operations or work that could affect the ride height of the vehicle.
4. Close the doors and verify that the luggage compartment is empty.
5. Stabilize the suspension by rocking the vehicle sideways.
6. Ensure that the fuel level is full.
7. Ensure that the tires are inflated to the proper pressure.
8. Ensure that the driver or a similar weight, approximately 75 kg (165 lbs) is in the vehicle driver seat.

Aiming Procedure

1. Park the vehicle 7.6 m (25 ft) away from the target screen.
2. Measure from the center of the fog lamp to the ground line. Using this measurement, mark the horizontal centerline (2) of the fog lamp on the target screen directly in front of the vehicle.
3. Turn ON the fog lamps. The top of the fog lamp beam image (4) on the target screen should be 102 mm (4 in) below the center of the fog lamp lens height.
4. Adjust the fog lamp as required, using the adjusting screw (1) on the top of the fog lamp.
5. Turn OFF the fog lamps.

1. Remove the spoiler from the liftgate. Refer to «Spoiler Replacement - Rear»(/chevrolet/equinox/i-2004-2009/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
2. Remove the spoiler to high mounted stop lamp screws.
3. Disconnect the electrical connector.
4. Disconnect the washer hose.
5. Remove the stop lamp from the spoiler.

1. Position the high mounted stop lamp to the spoiler.
2. Connect the washer hose.
3. Connect the electrical connector.
4. Install the spoiler to the high mounted stop lamp screws. Tighten: Tighten the screws to 2 N.m (18 lb in).
5. Install the spoiler to the liftgate. Refer to «Spoiler Replacement - Rear»(/chevrolet/equinox/i-2004-2009/remont/exterior-body-panels/#body-rear-end) in Body Rear End.

1. Using a flat-bladed tool, unsnap the lens from the cargo lamp assembly.
2. Using a flat-bladed tool, disengage the cargo lamp attaching clips by gently prying inboard, being careful not to break the attaching clips.
3. Pull downward and rearward on the cargo lamp to disengage the lamp from the headliner.
4. Disconnect the electrical harness from the cargo lamp.
5. Remove the cargo lamp.

1. Position the cargo lamp to the headliner and connect the electrical connector.
2. Slide the cargo lamp into place.
3. Snap the cargo lamp clips back into the closed position.
4. Snap the lens into the cargo lamp assembly.

1. Remove the cover from the dome lamp/cargo lamp.
2. Remove the bulb from the lamp.

1. Install a new bulb to the lamp.
2. Install the cover to the lamp.

1. Remove the screws (2) attaching the rear license plate lamp assembly to the rear license plate lamp bezel.
2. Lower the license plate lamp assembly (1) from the bezel.

1. Align license plate lamp assembly with the license plate lamp bezel.
2. Install the license plate lamp assembly to license plate lamp bezel screws (2). Tighten: Tighten the screws (2) to 4 N.m (35 lb in).

1. Remove the screws (2) attaching the rear license plate lamp assembly to the rear license plate lamp bezel.
2. Lower the license plate lamp assembly (1) from the bezel.
3. Rotate the license plate lamp bulb assembly counterclockwise and remove it from the housing.
4. Pull the license plate lamp bulb out of the bulb socket.

1. Press the license plate lamp bulb into the lamp socket until seated.
2. Install the license plate lamp bulb socket assembly (1) in the license plate lamp lens and rotate clockwise until seated.
3. Align license plate lamp assembly with the license plate lamp bezel.
4. Install the license plate lamp assembly to license plate lamp bezel screws (2). Tighten: Tighten the screws (2) to 4 N.m (35 lb in).

1. Remove the tail lamp bolt covers.
2. Remove the tail lamp bolts (3).
3. Pull outward at the front of the tail lamp assembly to disengage the retainers from the body side.
4. Remove the bulbs from the tail lamp assembly.
5. Remove the tail lamp assembly from the vehicle.

1. Position the tail lamp assembly to the vehicle.
2. Install the bulbs into the tail lamp assembly.
3. Push inward at the front of the tail lamp assembly to engage the retainers into the body side.
4. Install the tail lamp bolts (3). Tighten: Tighten the tail lamp bolts to 2 N.m (18 lb in).
5. Install the tail lamp bolt covers (4).

Scheme 23

Tail Lamp Assembly and /or Backup, Sidemarker, Stop, Turn Signal Bulb Replacement (Torrent)

Exterior Lamps

The exterior lighting system consists of the following lamps

1. The headlamps
2. The daytime running lamps
3. The fog lamps
4. The park, tail and marker lamps
5. The turn signal lamps
6. The hazard lamps
7. The stop lamps
8. The backup lamps

Headlamps

The headlamps may be turned on 2 different ways. First, when the driver places the headlamp switch in the ON position, for manual operation. Second, with the headlamp switch placed in the OFF position activating automatic lamp control (ALC).

The LH HDLP and RH HDLP fuse in the fuse block - underhood, supply battery positive voltage to both low and high beam lamps at all times. For manual operation, when the headlamp switch is in the ON position, the headlamp switch supplies ground directly to the headlamps and to the body control module (BCM) on the headlamp low or high beam signal circuit, depending on the position of the headlamp dimmer switch. The BCM uses this signal to determine if the conditions are present to illuminate the daytime running lamps or park lamps.

For ALC operation, the BCM receives a signal from the ambient light sensor indicating a low or high ambient, outside, light level. Under low light conditions the BCM grounds the headlamp relay control circuit energizing the headlamp control relay. The now closed relay supplies ground through the headlamp switch to the headlamps and the BCM on the headlamp low or high beam signal circuit, depending on the position of the headlamp dimmer switch. When the BCM grounds the headlamp relay control circuit it also grounds the park lamp relay control circuit illuminating the park lamps. The headlamp relay is grounded at G203.

If the engine stalls with the headlamps in the ALC mode under low light conditions, the headlamps will be controlled OFF during cranking.

The conditions necessary for the BCM to activate the ALC mode are as follows

1. The ignition switch is in the RUN position.
2. The headlamps are in the OFF position.
3. The park brake is released. If the park brake is applied after the ignition key is placed in the RUN position the ALC is not effected.

Daytime Running Lamps (DRL)

The low beam headlamps operate at reduced intensity when in daytime running lamps (DRL) mode. The ground circuit to the switch side of the DRL relay has a resistor in-line to reduce the intensity of the low beam headlamps for DRL operation. The body control module (BCM) receives a signal from the ambient light sensor indicating a low or high ambient, outside, light level. Under daylight conditions the BCM grounds the DRL relay control circuit energizing the DRL control relay. The now closed relay supplies ground directly to the low beam headlamps and to the BCM on the headlamp low beam signal circuit. The low beam headlamps now illuminate with reduced intensity. The DRL relay is grounded at G203. Any time the headlamps are illuminated the DRL will not illuminate. Manual park lamps do not effect DRL operation.

The conditions necessary for the BCM to illuminate the DRL are as follows

1. The ignition switch is in the RUN position.
2. The headlamps are in the OFF position.
3. The park brake is OFF, released.
4. The BCM is receiving a high light condition from the ambient light sensor.
5. The transmission is not in the PARK position.

Fog Lamps

The FOG LP fuse in the fuse block - underhood supplies battery positive voltage to the switch side of the fog lamp relay at all times. When the fog lamp switch is pressed, it supplies a momentary voltage signal on the front fog lamp switch signal circuit to the body control module (BCM). The BCM then supplies ground to the coil side of the fog lamp relay, energizing the relay. The switch side of the fog lamp relay then supplies voltage to both front fog lamps. The front fog lamps are connected to ground at G101. The park lamps or headlamps must be ON for the fog lamps to operate.

Park, Tail and Marker Lamps

The park lamps consist of the park, tail, marker and license lamps. These lamps are illuminated any time the headlamp switch is in the PARK, ON position, or anytime the body control module (BCM) illuminates the headlamps. The PARK fuse in the fuse block - instrument panel (I/P) supplies voltage to both the coil and switch input side of the park lamp relay. The BCM controls the park lamp relay by grounding the park lamp control circuit energizing the relay.

For automatic lamp control (ALC) the BCM receives a signal from the ambient light sensor indicating a low or high ambient (outside) light level. Under low light conditions the BCM grounds the park lamp relay control circuit energizing the park lamp relay. The now closed relay supplies voltage on the park lamp supply voltage circuit directly to the lamps. The BCM always turns ON the park lamps and headlamps together when in the ALC mode.

For manual operation, when the headlamp switch is in the PARK position, the headlamp switch supplies ground to the BCM on the park lamp switch signal circuit. In response, the BCM grounds only the park lamp relay control circuit, and the lamps illuminate as stated above.

The conditions necessary for the BCM to activate the ACL mode are as follows

1. The ignition switch is in the RUN position.
2. The headlamps are in the OFF position.
3. The park brake is released. If the park brake is applied after the ignition key is placed in the RUN position the ALC is not effected.

Turn Signal Lamps

The TURN fuse in the fuse block - I/P provides ignition positive voltage to the turn signal relay. The turn signal lamps may only be activated with the ignition switch in the ON position. When the turn signal switch is placed in either the left or right position, current flow is from the turn signal relay output to the turn signal switch assembly. The turn signal relay sends an ON-OFF voltage signal to either the left or right turn signals and their instrument panel cluster (IPC) indicator through the turn signal switch.

Hazard Lamps

The HAZARD fuse in the fuse block - I/P provides battery positive voltage to the turn signal relay. When the hazard switch is activated, the turn signal relay provides an ON - OFF voltage to all of the turn signal lamps and both turn signal indicators through the hazard switch. The lamps receive a ground at G101, G401, or G403.

Stop Lamps

The 15A BRAKE fuse located in the fuse block - underhood, supplies battery positive voltage to the normally open stop lamp switch. When the driver presses the brake pedal, the switch contacts close and battery positive voltage is supplied to both left and right stop lamp assemblies, the center high mounted stop lamp (CHMSL), the powertrain control module (PCM), and the throttle actuator control (TAC) module. The stop lamps are grounded at G401 and G403. The CHMSL is grounded at G301.

Backup Lamps

The 10A BACKUP fuse in the fuse block - underhood supplies ignition positive voltage to the park/neutral position (PNP) switch of the automatic transmission. When the transmission is placed in reverse, the switch supplies voltage to the back up lamps and the inside rearview mirror. The back up lamps receive ground at G401 and G403.

Interior Lamps

The interior lamps consist of 2 groups, those which can dim from the instrument panel (I/P) dimmer switch and those that can not dim.

Courtesy/Illuminated Entry Lamps

The following lamps may be manually turned ON by placing the interior lamp switch in the ON position, or by opening a door while the switch is in the AUTO position.

1. The dome lamp
2. The liftgate lamps
3. Courtesy/map lights

The courtesy lamp supply voltage circuit of the body control module (BCM) supplies battery positive voltage to the dome lamp, the liftgate lamps, and the map lamps. When any door is opened, the door jamb switch contacts close providing a door open input to the BCM. The BCM then provides a ground to the interior lamps with the switch in the AUTO position. The interior lamps receive a ground at G401 with the switch in the ON position.

If the driver inadvertently leaves any interior lamp ON, the BCM will turn it OFF after a 20 minute time-out.

The courtesy lamps will turn OFF immediately if the ignition switch is turned to the ON position or approximately 20 seconds after all doors are closed.

Keyless Entry Interior Illumination

When the body control module (BCM) receives a door unlock command from the remote keyless entry (RKE) transmitter, the BCM will flash the park lamps several times, illuminate the courtesy and park lamps, and illuminate the low beam headlamps at low intensity. The lamps will remain on until the ignition key is turned from the OFF position, a RKE door lock command is received, or after an approximate 20-second delay.

Interior Lamps Dimming

This group includes lamps which may dim. This group may use a combination of vacuum fluorescent (VF) illumination and incandescent lamps.

1. HVAC control module, head assembly
2. Radio
3. The instrument panel cluster (IPC)
4. The PRNDL lamp, with the exception of the current gear select position
5. Power window switches
6. Various switches

When the ignition switch is turned to the ON position, the VF display, radio, turns ON at maximum brightness. When the park lamps are ON, all incandescent back lighting turn ON at the dimming level indicated by the instrument panel (I/P) dimmer switch. At the same time all VF displays dim to match the indicated dimming level. When the headlamp switch is placed in the PARK position, the park lamp supply voltage circuit provides an input to the body control module (BCM). The BCM then supplies voltage to the I/P dimmer switch through the I/P dimming lamps control circuit. The setting of the I/P dimmer switch determines the amount of voltage that the I/P dimmer switch supplies to the BCM through the I/P dimming lamps low reference circuit. The BCM then sends a pulse width modulation (PWM) voltage to all the interior lamps. All the VF and incandescent back lighting lamps are provided a specific voltage and are then grounded. When the headlight switch is turned to the park lamp or headlamp position, all incandescent back lighting turn ON at the dimming level indicated by the I/P dimmer switch. When the I/P dimmer switch is moved from MIN to MAX, all VF displays, as well as all incandescent back lighting respond from minimum intensity to maximum brightness in response to the I/P dimmer switch.

Inadvertent Power

The body control module (BCM) used in this vehicle controls the lighting system through circuits that enable the interior lamps. The BCM opens these enabling circuits shortly after the ignition switch is turned OFF with no lamp switch activity. If the ignition switch is turned to any position other than OFF, or if a lamp switch is activated during this period, the timer will reset itself.

See also:
• Diagnostic System Check - Vehicle
• Testing for Intermittent Conditions and Poor Connections
• Circuit Testing
• Wiring Repairs
• Connector Repairs
• Control Module References
• Relay Replacement (Within an Electrical Center)
• Multifunction, Turn Signal Switch Replacement
• Diagnostic Trouble Code (DTC) List - Vehicle
• Checking Aftermarket Accessories
• Transaxle Range Switch Replacement
• Latch Replacement - Front Door
• Lock Plate and Rod Replacement - Liftgate
• Symptoms - Keyless Entry
• Master Electrical Component List
• Instrument Panel Cluster (IPC) Replacement
• Fastener Notice
• Air Outlet Replacement - Instrument Panel
• Windshield Upper Garnish Molding Replacement
• OnStar Microphone Replacement
• Fascia Replacement - Front Bumper (Equinox)
• Fastener Tightening Specifications
• Halogen Bulb Caution
• Lifting and Jacking the Vehicle
• Wheelhouse Liner Replacement - Front
• DTC B1482
• Backup Lamps Always On
• Backup Lamps Inoperative
• Courtesy Lamps Always On
• Courtesy Lamps Inoperative
• Daytime Running Lamps (DRL) Indicator Inoperative
• Daytime Running Lamps (DRL) Inoperative
• Fog Lamp Indicator Inoperative
• Fog Lamps Always On
• Fog Lamps Inoperative
• Hazard Lamps Inoperative
• Headlamps Always On - Low or High Beam
• Headlamps Inoperative - High Beams
• Headlamps Inoperative - Low Beams
• Headlamps Inoperative - Low and High Beams
• Headlamps Inoperative - Flash to Pass
• High Beam Indicator Inoperative
• Illuminated Entry Lamps Inoperative
• Interior Backlighting Does Not Dim
• Interior Backlighting Inoperative
• Park Lamps Always On
• Park Lamps Inoperative
• Reading Lamp(s) Inoperative
• Stop Lamps Always On
• Stop Lamps Inoperative
• Turn Signal Lamps and/or Indicators Always On or Flashing
• Turn Signal Lamps and/or Indicators Inoperative
• Fastener Tightening Specifications
• Fog Lamp Aiming Procedure