Troubleshooting Hints - Instrument Panel Dimming

1. CHECK the condition of the PARK LPS FUSE 9 and the ILLUM FUSE 4. If either Fuse is open, then LOCATE and REPAIR source of overload and REPLACE Fuse.
2. CHECK that G1O3, G104, G200 and G400 are clean and tight.
3. CHECK for open filaments in any inoperative lamps. If Radio illumination is inoperative, remove Radio for REPAIR. If Instrument Cluster illumination lamps are inoperative and the Wiring is OK, then REPLACE the Instrument Cluster.
- 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 "Troubleshooting Procedures"). Diagnostic Aids