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Preliminary Inspection
- Check power window system circuit breaker located in left instrument panel fuse block. See COMPONENT LOCATIONS
. See Fig 1
. Ensure grounds are clean and tight. See WIRING DIAGRAMS
. If only master window switch operates windows, ensure lock-out switch is not engaged (Impala).
- Check for broken or partially broken wire inside insulation which would cause system failure but prove good in continuity/voltage check. Ensure proper installation of aftermarket electronic equipment that may affect integrity of other systems. If problem still exists, perform DOOR SYSTEM DIAGNOSTIC SYSTEM CHECK
under SELF-DIAGNOSTIC SYSTEM.
Courtesy of GENERAL MOTORS CORP.