Last night the horn in my 2005 Malibu Classic started going off by itself. I had to sleep in my car because it kept happing so often. Today it is enven doing it while I am driving. What is causing this?

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.

Visual/Physical Inspection

• Inspect for aftermarket devices (Alarm System if applicable) which could affect the operation of the horn system.
• 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 (7 lb ft) .

• Horns Always On

1. This step tests if ground is constantly being applied to the horn relay.