Dome Lamps Malfunction
Dome Lamps Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The dome lamp which is located on the dome/reading lamps module and accent lamps are controlled by the body control module (BCM). Inputs from the dome lamp switch and the door ajar switches are monitored by the BCM. When a door ajar switch is closed, or the dome lamp switch is turned to the ON position, the BCM supplies the B+ for the dome and courtesy lamps.
* Dome/reading lamps
* Dome/Reading Lamps - Row
Reference Information
Schematic Reference
Interior Lights Schematics Interior Lights Schematics
Connector End View Reference
Component Connector End Views Sunshade - Left (DH6)
Description and Operation
Interior Lighting Systems Description and Operation Interior Lighting Systems
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References
Circuit/System Verification
1. Observe the driver information center while opening and closing each vehicle door and the liftgate. The driver information center should display the door ajar/liftgate ajar message only when the door/liftgate is open.
• If the driver information center displays the door ajar/liftgate ajar message when a door or the liftgate is closed, refer to Door Ajar Indicator Malfunction Door Ajar Indicator Malfunction.
2. Ignition ON, cycle the Dome/Reading Lamps switch in all positions, observe the scan tool Dome Lamp Switch parameter. The parameter should change between Door, Cancel and On.
• If the parameter does not change, refer to Dome Lamp Switch Malfunction.
3. Ignition OFF, open driver door, the dome and accent lamps should go ON.
• If the dome and courtesy lamps stay OFF, refer to Dome Lamp Malfunction.
Circuit/System Testing
Dome Lamp Switch Malfunction
1. Ignition OFF, disconnect the harness connector at the E37A Dome/Reading Lamps.
2. Disconnect the negative terminal of the C1 Battery.
3. Test for less than 5 ohms between the ground circuit terminal 6 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
4. Reconnect the negative terminal to the C1 Battery
5. Ignition ON, verify the scan tool Dome Lamp Switch parameter is Auto when the switch is in Door position.
• If the scan tool Dome Lamp Switch parameter is Cancel, test the dome lamp defeat signal circuit terminal 4 for short circuit to ground. If the circuit tests normal, replace the K9 Body Control Module.
• If the scan tool Dome Lamp Switch parameter is On, test the dome lamp on signal circuit terminal 5 for short circuit to ground. If the circuit tests normal, replace the K9 Body Control Module.
6. Install a 3 A fused jumper wire between the dome defeat signal circuit terminal 4 and the ground circuit terminal 6. Verify the scan tool Dome Lamp Switch parameter is Cancel.
• If not the specified state, test the dome lamp defeat signal circuit for short circuit to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
7. Install a 3 A fused jumper wire between the dome lamp on signal circuit terminal 5 and the ground circuit terminal 6. Verify the scan tool Dome Lamp Switch parameter is On.
• If not the specified state, test the dome lamp on signal circuit for short circuit to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
8. If all circuits test normal, test or replace the E37A Dome/Reading Lamps.
Dome Lamp Malfunction
1. Ignition OFF, disconnect the harness connectors at the appropriate dome lamp.
2. Disconnect the negative terminal of the C1 Battery.
3. Test for less than 5 ohms between the ground circuit terminal 6 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
4. Reconnect the negative terminal to the C1 Battery.
5. Connect a test lamp between the control circuit terminal 2 and the ground circuit terminal 6.
6. Command the Courtesy Lamps ON and OFF with the scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.
• If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
7. If all circuits test normal, test or replace the E37A Dome/Reading Lamps or E37B Dome/Reading Lamps - 2nd Row.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Dome and Reading Lamp Replacement Dome and Reading Lamp Replacement
* Dome and Reading Lamp Lens Replacement Dome and Reading Lamp Lens Replacement
* Control Module References Control Module References for BCM replacement, setup, and programming