Troubleshooting Hints - Interior Lights Dimming

1. Check the PARK LPS Fuse by turning the Headlamp Switch to PARK and observing that the Park Lamps come on.
2. If none of the Instrument Panel Lamps come on and the PARK LPS Fuse is OK, check the INST LPS Fuse.
3. If Rear Park Lamps are inoperative, refer to Exterior lamps in Electrical Diagnosis.
^ Refer to Instrument Panel, Gauges and Console for Instrument Panel access. Instrument Panel, Gauges and Warning Indicators
^ 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 (refer to General Troubleshooting Procedures). Diagnostic Aids