Troubleshooting Hints - Instrument Panel Dimming

PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS
1. Make sure Park Lamps turn "ON" and "OFF" normally before proceeding with System Diagnosis, refer to Exterior Lamps for Park Lamp diagnosis. Testing and Inspection
2. Check I/P Fuse #42. If I/P Fuse #42 is open, check for a short to ground in CKT 44, CKT 8, or in CKT 32.
3. Check that G200 and G201 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 (refer to General Troubleshooting procedures). Diagnostic Aids
^ Refer to System Diagnosis.