Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
An intermittent may be caused by the following conditions:
- Faulty connections.
- Rubbed-through wire insulation.
- A broken wire inside the insulation.
All of the 5-volt reference circuits must be checked for proper reference voltage. Voltmeter accuracy is important.