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Horn Relay is failing (switch is closing) perhaps due to cold weather. Take relay out and test in freezer to see if switch closes. Or, there is a short somewhere in the circuitry - especially look at the steering wheel horn switch, as that assembly moves and could have been chaffed.

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โˆ™ 2008-11-07 15:58:07
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Q: What could cause the horn to come on by itself?
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Related questions

Why do I have no sound from the horn Is it the horn itself or a relay?

could be either. or a fuse.

Can a horn relay be the reason why the horn wont blow?

It could be the relay or the fuse or the horn itself. Or, it could be all three!

How do you get horn to work?

You have to determine the cause first. Check the horn switch and contacts, fuse, relay and the horn itself.

How do you fix a horn on a 2000 Ford Explorer?

To start with you have to determine the reason the horn has failed. Check the fuse, the horn relay, the horn switch/contacts in the steering wheel and the horn itself. Once you have found the cause then you can fix it.

What would cause 2002 Malibu horn stop working?

could be horn relay in underhood fuse box. or bad horn..

What could be wrong if the horn on a 1998 Mazda Protege clicks but does not make a sound?

It is in front of the radiator and the horn itself can be bad.

What would cause the horn to blow by itself with the car turned off?

An electrical short to ground.

1998 caravan and the horn does not work fuse is fine and van was built in 1997 not part of recall?

Check to see if you are getting power to the horn itself if so it may be bad Could be horn relay Could be horn switch Replace with an auxilliary switch on dash

Why would a horn not blow on a 1999 Saturn if the fuses are good?

It could be the horn relay which is typically located in the fuse box. It could also possibly be a defective horn switch which can be checked at the proper relay pin location. You will need a service manual for the proper pin location. The wiring could be bad. Or it could just be the horn itself.

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A loose wire would cause the horn to stop working on your Dodge Avenger 2.4L engine.

How do you fix a car horn for a 1997 ford escort?

See if you are getting power to the horn itself-they have a tendency to fail If not it could be relay or switch at steering wheel

How do you fix a horn on the Saturn L100?

That depends entirely on what's wrong with the horn. It could be a problem with the horn relay, in which case you simply replace the relay. (Under the hood, in the fuse/relay box next to the battery) It could be a problem with the horn itself, in which case you simply replace the horn. It could be a problem with the horn switch, which is a part of the steering wheel. If that's the case you'll need to replace the steering wheel or horn switch. It could be a problem with the horn wiring, in which case you'll need to track down the specific problem and repair it. Good luck.

Where is the horn on a 2001 Malibu It stopped working what can be wrong with it?

check the horn relay or the horn itself!

Why would a horn stop working?

It can be a bad ground, bad relay, bad connection, wire, steering wheel horn switch, fuse or even the horn itself could have failed. You'll have to track it down.

Could an incorrectly placed airbag cause the horn to be stuck on a 1998 Pontiac Sunfire?


When you blow your horn on your Mazda it blows a fuse?

Then you have a short in the wiring, the horn button is defective, or the horn itself is defective.

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Many times the horn itself could be bad; if you have power to the horn and no sound, replace the horn. I would get one from a salvage yard for $10-15. Roll down window. Hollar real loud "LOOK OUT!"

The horn on your 1993 Ford Tempo GL only works occasionally would the problem be the horn or could it be a fuse?

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Horn ProblemBlown fuse, defective horn, defective horn switch, or loose wire. Check your fuse first. If that doesn't appear to be the problem, then you have to troubleshoot. I think that I would start my troubleshooting right at the horn itself. I would run a hot 12v lead from the battery terminal to the horn and tap the terminal to see if the horn responds. If you do not hear the horn trying to honk. I would replace the horn. You might also want to have someone press the horn button while you hold a 12v test light on the end of the horn wire at the horn itself. If you have power reaching the end of the wire, then the problem is surely the horn. You may want to check to make sure the horn is properly grounded as well. It is a pretty simple circuit and its most likely to be a blown fuse or a bad horn. Some other things that could cause this is a short in the horn circuit, most likely inside the steering wheel cover. If you do not have a blown fuse and you have no power reaching the end of the wire when the horn button is pressed, then you should disassemble the steering wheel cover and observe the horn wiring inside for any breakage or corrosion.

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Most likely a blown fuse. But, the horn itself can be defective.

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A loose wire or a blown fuse would.

How do you fix the horn on a 2002 Mitsubishi Diamante?

If you have power and ground at the horn when activated, the horn itself is bad it needs to be replaced. If you don't get power or ground it could be faulty wiring that would need repairing or a relay if it has one (1998 model did and its in the passenger compartment fuse panel). If it has a relay, swapping it with a similar accesories relay, I.E. a/c, to check. If get power to the horn the realy is bad and needs replacing. If you still don't, yo can apply power and ground to the horn to check it. If it works the wiring is faulty.

Cause of horn on a vehicle to just start going off wont stop had to disconnect battery went to leave few hours later connected battery just fine did try to honk the horn did not apply much pressure no?

usually a stuck horn is caused by a bad horn relay.sometimes it is the horn switch itself sticking.even rarer is a faulty horn that becomes stuck. try the relay.

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You have a bad clock spring ( the wiring assemble behind the steering wheel ).

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