Preliminary Inspection

Check condition of POWER WINDOW circuit breaker (30-amp) located in body relay block. See COMPONENT LOCATIONS  . Check for mechanical failures or binding linkage. If express down feature does not work but window moves down with each switch depression, replace master switch assembly. Check for broken or partially broken wire inside insulation which could cause system malfunction but prove good in a continuity/voltage check. 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, perform appropriate system test. See SYMPTOM TESTS  .