horn stopped working

woob said:

I agree, Check the fuse. My horn / cruise control went out at the same time, replaced fuse and they both worked again.

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which fuse is it for the horn/cruise?

BigHairyMonkey said:

which fuse is it for the horn/cruise?

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#16



Thanks to TMoss!!! Source site: http://www.veryuseful.com/mustang/tech/engine/

My first mustang was an 87 lx hatch. I had a problem with my horn where it would work and not work off and on. I found out when I took off the horn button that it wasn't the horn itself but, the horn button. The copper ring under the button was corroded. I brush it a bit and used a approved electric cleaner and it work for a bit and then stopped. I then replaced the whole wheel just because the padding was bad and had no problems after that.

The horn circuit has a button that supplies ground, a relay that uses the button to switch the horns on and off, and two horns. The relay reduces the current that the horn button has to carry. This makes it possible to use a small and simple switch and slip ring on the steering wheel.




The horns typically develop an internal short to ground, which causes the fuses to blow.

The horns are located under the car on the driver's side, forward of the front wheel well. Disconnect BOTH horns, replace the fuse: if the fuse blows immediately, the problem is most likely in the cigar lighter circuit. If not, then press the horn button on the steering wheel: if the fuse blows the problem is in the wiring between the horn relay and the horn. If doesn't blow when you press the horn button, connect ONE of the horns and try again. If it still doesn't blow the fuse, connect the other horn. Chances are that the first horn you re-connect will blow the fuse. Whatever horn blows the fuse at this point has an internal short and is trash. Time for a trip to the junkyard...

Oh I should also add that I once accidently dropped a couple coins into my cigar lighter and it caused a short that blew the fuse and rendered my horn inop

I should also mention that I once left my top down and it started raining and the power mirror switch got wet. It caught fire the next morning and blew the fuse. I unplugged the switch and replaced the fuse and everything worked. Now I still need a damn switch.