Find the horn and use a test light to try to ground out one of the two terminals to see if it sounds. If it does, then the horn is ok, but it may be the switch in the steering wheel.
To test the steering wheel switch, take the horn cover off of the steering wheel and search for the lead for the button and try to ground it out. It may sound if you do this. If it does, then there is something wrong with the button connection at the clock spring.
Here are instructions on how to remove and replace the steering wheel which can help to understand how to troubleshoot the horn switch which is related to the clock spring electrical connector:
Removal & Installation
: Make sure the wheels are in the straight-ahead position. Disconnect the battery ground cable and wait at least one minute.
To avoid the risk of serious personal injury, read and follow all warnings, notes and instructions in the deactivation procedure. Deactivate the supplemental restraint system (SRS).
- Remove the driver side air bag.
- Disconnect the clockspring electrical connector.
- Remove and discard the steering wheel bolt.
- Use steering wheel puller and remove steering wheel.
Removing the steering wheel without using a puller can damage the column bearings. Using a suitable puller, remove the steering wheel.
Remove the steering wheel while routing the wires from the clockspring through the steering wheel.
To avoid the risk of serious personal injury, read and follow all warnings, notes and instructions in the reactivation procedure. Reactivate the supplemental restraint system (SRS).
- Install steering wheel, while guiding wires from clockspring through.
- Install new steering wheel bolt. Tighten to 30 ft. lbs. (40 Nm).
- Connect the clockspring electrical connector.
- Install the driver's side air bag.