Troubleshooting Hints - Interior Lights

Perform before beginning System Check
1. If the Dome Light or all of the Courtesy Lights do not operate, check Fuse 11.
2. If only one light does not operate, check bulb and related wiring.
3. If Cigar Lighter does not operate, check Fuse 6, CKT 540 and CKT 150 for an open. If OK, replace Cigar Lighter.
4. If Courtesy Lights operate from Dimmer Switch control but do not operate when door is open, check CKT 156 and suspect Door Jamb Switch for an open.
^ Refer to System Check. Initial Inspection and Diagnostic Overview
^ Check for a broken (or partially broken) wire inside of the insulation which could cause system failure but prove "GOOD" in a continuity/voltage check (Refer to "Diagnostic Aids/General Troubleshooting Procedures,") Diagnostic Aids
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems (Refer to "Diagnostic Aids/General Troubleshooting Procedures,") Diagnostic Aids