Component Tests and General Diagnostics

Perform before beginning System Diagnosis

1. Check PWR ACC Circuit Breaker by operating the Power Door Locks or Power Seats (if equipped).
2. Check GAGES Fuse by observing the "Check Engine" light with the Ignition Switch in "RUN" and the engine "OFF".
3. If one or more of the grid lines do not heat, refer to Section for grid line repair procedures.
4. If the Panel Light is inoperable with the Headlight Switch in "PARK" or "HEAD," check bulb and wiring to bulb refer to Diagrams. Diagrams
^ Refer to System Diagnosis. System Diagnosis - Rear Window Defogger & Heated Mirrors (SSE & SSEI Models)
^ 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. Diagnostic Aids
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems refer to Diagnostic Aids. Diagnostic Aids