Troubleshooting Hints - Interior Lights Dimming

PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS
1. Make sure Park Lamps turn ON and OFF normally before proceeding with System Check. Refer to Exterior Lamps for Park Lamp diagnosis.
2. If only one lamp does not light, check bulb, socket and related wiring (see schematic).
3. Check Trunk Compartment Fuse Block Cluster Fuse, RLY IGN 1 Fuse, and IGN 0-BODY by visual inspection.
4. Check that grounds G201, G203, G204, G302 (Eldorado/Seville) and G400 are clean and tight.
5. Before component replacement, check that system connections are clean and tight.
^ Check for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a continuity/voltage check with a system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should be checked by monitoring for a voltage drop with the system operational (under load).
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems.