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.

Reference Information
Schematic Reference

Interior Lights Schematics (Interior Lights Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Interior Lighting Systems Description and Operation (Interior Lighting Systems Description and Operation)
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 (Programming and Relearning) for scan tool information

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 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 Malfunction
1. Ignition OFF, disconnect the harness connectors at the appropriate dome lamp.
2. Test for less than 5 ohm between the ground circuit terminal 6 and ground.

• If greater than the specified range, test the ground circuit for an open/high resistance.

3. Connect a test lamp between the control circuit terminal 2 and the ground circuit terminal 6.
4. 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.

5. 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 - Front (Dome and Reading Lamp Replacement - Front)
* Dome and Reading Lamp Replacement - Rear (Dome and Reading Lamp Replacement - Rear)
* Control Module References (Programming and Relearning) for BCM replacement, setup and programming