While driving home yesterday, all of a sudden my horn started blasting a constant BEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEP. It would not turn off. Of course all the cars around me on the road were looking at me kind of strangely. Everything else on the car seemed to be working normally, and it drove fine. I pulled off into a parking lot, and turned the car off. Guess what? The horn was still blowing loudly. Then I turned off the light switch which was on the ON position and the horn stopped.

I restarted the car and no horn blowing. Whew! Then as soon as I turned on the lights, BEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEP. It was about 5pm EST and just beginning to get dark. As long as I kept the light switch in the off position, no horn, no problem. Turn it on even to auto or driving light position, and sure enough, BEEEEEEEEEEEEEEEEEEEEEEEEEEP.

So I immediately drove to the dealer with no lights on. They indicated the technician that could look at it had left for the day. They gave me a loaner to take with me. Today they called me and said the part they needed to fix the problem was not in stock and would take a couple of days. So I am keeping the loaner until they get it fixed.

Anyone else had anything wierd like this happen? I hate electrical problems on cars, once they start, it seems like you never get rid of them. I will let you know how things work out when they get it fixed.

How long have you had the car?

That is pretty strange..

Evidently the BLEEPING light switch runs through the BLEEPING horn relay...

Sorry - couldn't resist... There is most likely a connection there though..

Regards - Randy




If there's one thing I've learned in online forums its this:
Never argue with an idiot, they'll drag you down to their level and beat you with experience!

I have heard of this happening with other cars.

I got my TCH in July.

Sounds like a short in the control module in the steering column to me. If it was just a wiring short they wouldn't need to wait for a part.

See post 8-

I had the same problem only my horn melted. they put in a whole new relay/fuse box and the car has been perfect since.

My SWAG is the wire controlling the horn and the wire controlling the light are "pinched/shorted together" somewhere (as in the steering column?). Could be a defective wire/harness/connector/other.

Makes sense. The lifetime of a horn is 15 minutes of usage.