Preliminary Inspection
- Check condition of POWER WINDOW circuit breaker, located in Left Bussed Electrical Center (LBEC). See COMPONENT LOCATIONS . If circuit breaker is open, locate and repair cause of overload. Replace if damaged.
- Check IGN B maxifuse (50-amp) located in Left Bussed Electrical Center (LBEC). If fuse is blown, locate and repair source of overload. Replace fuse.
- Check RAP maxifuse (50-amp) located in Underhood Bussed Electrical Center (UBEC). If fuse is blown, locate and repair source of overload. Replace fuse.
- Check for mechanical failures or binding linkage.
- If express down feature does not work, but window moves down with each switch depression, replace left window switch.
- Check for broken or partially broken wire inside insulation, which could cause system malfunction but prove good in a continuity/voltage check with system disconnected. These circuits may be intermittent or resistive when loaded. Check by monitoring voltage drop with system under load.
- Check for proper installation of aftermarket electronic equipment. If problem still exists, repair by appropriate symptom. See SYMPTOM INDEX table under SYMPTOM TESTS.