Important: Review the system operation in order to familiarize yourself with the system functions. Refer to 
Horns System Description and Operation.
Visual/Physical Inspection
|     •  | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. | 
 
|     •  | Perform the following if a horn buzzes or has a harsh tone. | 
 
|        -  | Inspect for debris in the joint where the horn fastens to the vehicle. | 
 
|        -  | Test the torque of the horn mounting hardware. The horn mounting hardware should be tightened to a torque of 10 N·m (7 lb ft).  | 
 
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to 
Testing for Intermittent Conditions and Poor Connections.
Symptom List
Refer to a symptom diagnostic procedure 
Horns Malfunction in order to diagnose the symptom.