Interior Lighting

NOTE: The LCM must be reconfigured upon replacement.

1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical and electrical damage.

VISUAL INSPECTION CHART

Mechanical
^ Door ajar switches.

Electrical
^ Central Junction Box Fuses 4 (15 A), 6 (15 A), 14 (20 A), 8 (15 A), 13 (15 A), 30 (7.5 A)
^ Battery Junction Box Fuse 8 (30 A)
^ Circuitry.
^ Miniature bulbs.
^ Connectors.
^ Interior lamps.
^ Lighting Control Module (LCM)
^ Circuit Breaker 12 (18 A)

3. If the concern remains after the inspection connect the New Generation STAR (NGS) Tester to the data link connector located beneath the instrument panel and select the vehicle to be tested from the NGS menu. If the NGS does not communicate with the vehicle:
^ check that the program card is correctly installed.
^ check the connections to the vehicle.
^ check the ignition switch position.
4. If the NGS still does not communicate with the vehicle, refer to the NGS Tester manual.
5. Carry out the DATA LINK DIAGNOSTIC TEST. If the NGS responds with:
^ CKT914, CKT915 or CKT7O = ALL ECUS NO RESP/NOT EQUIP, refer to Information Bus.
^ NO RESP/NOT EQUIP for LCM, go to Pinpoint Test A. A No Comm w/LCM-Unable/ON-Demand Self Test
^ NO RESP/NOT EQUIP for DDM, go to Pinpoint Test O. O No Comm With the Module - DDM
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and perform self test diagnostics for the LCM and DDM modules.
6. If the DTCs retrieved are related to the concern, go to the LCM or DDM Diagnostic Trouble Code Index to continue diagnostics. LCM Diagnostic Trouble Code Index or DDM Diagnostic Trouble Code Index
7. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics. Interior Lighting