Component Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. 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 15 A fused jumper wire between the control terminal B and 12 V.
- 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.