Flow of Diagnosis

1. Verify the customer's concern by operating the horn system to duplicate the condition.
2. Inspect to determine if one of the following mechanical or electrical concerns apply:

VISUAL INSPECTION CHART

Mechanical
^ Verify that horn retaining nut 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.
^ Blocked horn openings.
^ Check system Fuse HRN (15 A).
^ Check wiring for obvious short or opens.
^ Check connectors for obvious damage.

3. If the inspection reveals obvious concerns that can be readily identified, service as required.
4. If the concerns remain after the inspection, determine the condition and go to the Symptom Chart. Symptom Related Diagnostic Procedures