Component Testing
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Horn
- Ignition OFF, disconnect the harness connector at the appropriate horn.
- Install a 15A fused jumper wire between the control terminal B and 12V.
- Install a jumper wire between the ground terminal A and ground. Verify the horn emits a clear and even tone.
- If the sound emitted is not clear and even, replace the horn.