GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Catera 🢒 Body and Accessories 🢒 Horns 🢒 Horns System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Press and release the left horn switch.
  2. Press and release the right horn switch.

Both horns sound for as long as the switches are pressed.
    •  Horns Inoperative
    •  Horns Always On

2
  1. Install the scan tool.
  2. Select the miscellaneous test in special functions.
  3. Command the BCM to turn both of the horns ON.

Both horns sound for as long as the BCM has the horns turned ON.

Horns Inoperative

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