Horn not working at steering wheel, work on alarm

You cannot assume anything today because there are multiple computers hung onto every circuit. You would be right on older vehicles that twelve volts should be at the horn relay. In this case the clock spring is a good suspect, but the repair estimate is way out of line. Thanks to the liability insurance built into the cost of the part, a typical clock spring should cost around $150.00. Unless there's something I am not aware of, replacement should take about an hour.

This wiring diagram below can show you how the system works.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

The clue you should look for is if the clock spring is coming apart, other functions on the steering wheel will also fail. That can include cruise control switches, and the airbag warning light will turn on.

If only the horn function is dead, I would recommend using a scanner to see what the Integrated power module is seeing as far as "horn request" signal. If that is showing up when you press the horn switch, that module becomes the better suspect.

Check out the diagrams (Below). Please let us know what happens.

Yah. I gots a lot of people fooled.

The fuse needs to have power on both sides.
Do you hear the horn relay clicking?
Do they blow when you run power from the battery?

It comes through the turn signal switch. Does the relay click when pushing on the pad?

Gain access to the turn signal connector start probing them with a test light when you hit the horn wire it will sound. If it does not your problem is in the steering column.

Here you go

Did you use a testlite at the horn relay? Terminals 30 and 86 are hot all the time. If you use a jumper between cavity 30 and 87, the horn should sound, does it? If it does, the problem is in the steering column or front control module.

Just remove the under dash panel you will see 2 wiring harnesses coming from the steering column one is from the wiper switch and the other is from the turn signal switch. They both go to a connector near the firewall. This is where you probe it.

Hey, Razmataz, I didn't see your post.

Good job you found it. So everything's okay. Check to see if you get voltage at the horn harness if not you will need to find the relay and ck. To see if it is working.

Find the dark green wire with violet tracer, under the dash. Use a jumper wire splice into dk grn/vio wire, ground other end of jumper to chassis ground, if horn sounds, the problem should be in the steering column. All repair info says to disarm airbag where applicable when working under the dash.