GM Service Manual Online
For 1990-2009 cars only

Horns Diagnostic System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Listen for horn while depressing horn switch.

Horn sounds with switch depressed.

Refer to Horns Inoperative

2

Release the horn switch.

Horn does not sound when switch is released.

Refer to Horns Always On

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.