Test Description
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- 4) - Tests if ground is constantly being applied to the horn relay.
- 5) - The horn relay control circuit includes the horn switch. The horn switch must be tested for a short to ground when testing the relay control circuit.