Important: The following steps must be completed before using the symptom tables:
- On vehicles equipped with content theft deterrent (UA6), perform 
Diagnostic System Check - Vehicle
 before using the symptom tables in order to verify that there are no DTCs set.
 
- 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 from the following list in order to diagnose the symptom: