Important: The following steps must be completed before using the symptom tables:

Review the system operation in order to familiarize yourself with the system functions. Refer to Horns System Description and Operation .

1. Inspect for aftermarket devices which could affect the operation of the horn system. Refer to Checking Aftermarket Accessories .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. 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).

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

Horns Malfunction