Preliminary Inspection

Verify customer complaint by operating power window system. Visually inspect for obvious signs of mechanical and electrical damage. Inspect for blown fuses and damaged relays. Inspect for loose or corroded connections, damaged wiring harnesses and/or switches. Check for a broken or partially broken wire inside insulation, which could cause system malfunction but prove good in a continuity/voltage check with system disconnected.

Check to see that the PWR WDO Circuit Breaker is not damaged, replace if damaged. Ensure any aftermarket electronic equipment is properly installed. If fault is found, repair as necessary. If no fault is found, diagnose by symptom. See SYMPTOM INDEX  table under SYSTEM TESTS.