Preliminary Inspection
Verify customer complaint by operating system. Visually inspect for obvious signs of mechanical and electrical damage. Inspect for blown fuses. For fuse and/or relay identification, refer to illustration. See Fig 1 . Inspect for loose or corroded connections, damaged wiring harnesses and/or switches. Check for missing or damaged connector seals. 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. Pay special attention to harness routing where wires are hinged or make sharp bends. 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.