Flow of Diagnosis

1. Verify the customer concern by operating the horn.
2. Visually inspect for obvious signs of mechanical and electrical damage using the following chart:

Visual Inspection Chart

Mechanical
- Damaged horns

Electrical
- Blown fuse
- Damaged wiring harness
- Loose or corroded connections

3. If fault is not visually evident, determine the symptom and proceed to the Symptom Chart. Symptom Related Diagnostic Procedures