Preliminary Inspection

Ensure grounds are clean and tight. If only master window switch assembly operates windows, ensure lock out is not engaged (4-door). Check for broken or partially broken wire inside insulation which would cause system failure but prove okay in continuity/voltage check. Ensure proper installation of aftermarket electronic equipment that may affect integrity of other systems. If no problem is found, repair by symptom. See SYMPTOM INDEX  table under SYSTEM TESTS.