Flow of Diagnosis

Inspection and Verification
1. Verify the vehicle owner's original concern by operating the horn system to duplicate the vehicle owner's concern.
2. Inspect to determine if one of the following mechanical or electrical concerns apply:

Mechanical
- Verify that horn retaining screw is tight
- Verify that horns are not touching surrounding sheet metal or other components

Electrical
- Verify that the ground of the horn is good by inspecting connection for corrosion
- Check system fuse
- Check wiring for obvious short or opens
- Check connectors for obvious damage