Diagnostic Aids
WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to TESTING FOR ELECTRICAL INTERMITTENTS , TESTING FOR INTERMITTENT AND POOR CONNECTIONS , WIRING REPAIRS and CONNECTOR REPAIRS in Wiring Systems.