Preliminary Inspection

Check for loose or corroded connections, damaged wiring harness and/or switches. 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. Repair as necessary. Ensure any aftermarket electronic equipment is properly installed. Repair as necessary. If concern still exists, Perform appropriate system check. See INSTRUMENT CLUSTER SYSTEM CHECK  or AUDIBLE WARNINGS SYSTEM CHECK  .