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 attaching bolts are tight
- Verify that horns are not touching surrounding sheet metal or other components

Electrical
- Verity 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

3. If the concern(s) remains after the inspection, determine the symptom(s) and proceed to the symptom chart. Symptom Related Diagnostic Procedures