Diagnostic Aids
WARNING: This page is about a different car, the 2002 GMC Safari and 2002 Chevrolet Astro. 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 & POOR CONNECTIONS , WIRING REPAIRS and CONNECTOR REPAIRS .