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My question on my 94 toyota pickup 2wd; how can I check to see if the horn contacts are making contact? since the horn contacts are located under the steering wheel, and the air bag is also located there, how can they be checked? can the steering wheel horn cover be removed without damaging the air bag? I have test the horn itself by going connecting it directly to the battery and it works. the horn fuse is good; but when I push on the horn; sometimes it works; sometimes it doesn't. I suspect the horn contacts but I don't know how to remove the steering cover. I don't have an repair manual. Thanks for the reply.
Re: My question on my 94 toyota pickup 2wd; how can I...
Disconnect the negative batery terminal be fore you mess with the horn. the cover should come off easily and you will the wire for the horn on my car the wire is green
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Start with the fuse. If good, then check the wire. It is a single brown wire, horn is grounded at it's attachment point to the body, between the front grille and radiator on the driver's side. Starting there is easiest. Use a test light at the connector clip while pushing the horn button. If the circuit is good, but no sound, you need a new horn. Often times, wear and tear will cause the clip to fall off the blade contact. If the circuit is no good, pull the center plug from the steering wheel and check the circular contact ring and tab. The ring can build up gunk and also wear through, then not make proper contact with the horn button contact tab.
My 1987 pickup has a broken horn too. I looked into it and think I know the reason. The steering wheel has a little pin that rubs up on a metal disk, and this pin and disk are what supply the battery voltage to the horn button on the steering wheel. I can see a small gap between the two. The pin appears to have been worn away just enough that it doesn't make contact anymore. If I shove a piece of metal into the gap my horn will work. I need to replace the pin.
It may not be the fuse. Your problem could be the same as I am having, there are two bushings that spin around with the steering wheel making contact on the steering column that wear down over the years and no longer make contact. I originally placed cardboard shims behind the contact surface to push it up some, worked for a little while The bushings need to be replaced when they get too short.
Most vehicles have a horn relay, which should be in a fuse box under the hood. Toyota is usually pretty good at identifying the various relays and fuses in the fuse box. If your original horn was shorted, it very well could have welded the contacts in the horn relay together. Also an aftermarket horn could be drawing more amperage than an original equipment unit, causing the fuse to burn. This last statement is purely conjecture.
THE HORN MAY BE BAD. HORN FAIL FROM AGE & LONG PERIODS OF NON USE. TRY PUTTING BATTERY POWER RIGHT TO THE HORN. IF NO SOUND OR VERY POOR RESPONSE, GET A NEW HORN. IF IT SOUNDS LIKE A HORN, CHECK THE HORN FUSE WITH A TESTER, " THERE SHOULD BE POWER ON BOTH SIDES OF THE FUSE. IF THE FUSE IS GOOD, PULL THE STEERING WHEEL, THERE MAY BE A WORN BRASS CONTACT STICKING UP. PUT A WIRE FROM THAT CONTACT TO SOME METAL UNDER THE DASH, IF THE HORN WORKS YOU WILL HAVE TO WORK ON THAT CONTACT OR MAYBE THE HORN BUTTON ON THE STEERING WHEEL
The wires should be visible after removing the centre part of the steering wheel, unless it has an air bag? a flat screw driver will pop off the toyota badge the wires are in there.
Its unlikely it will be the problem though. the wiring is the most common fault of horn failure. is the horn a meatl one screwed to the body of the car?
If so then you need to make sure that the horn is in good contact with the car, the car is the earth wire to the horn, no earth no horn. get a bit of sand paper and sand off the area where the contact is made, until its shinny metal then bolt it back up and try it.
If not that then check the wire connections to the horn and the wiring as far back as you can go see if any of it has been melted by something else, Common!!
Horns need a lot of power to make then function so if they dont have a good contact they just wont work,
when I had that problem it was the contacts under the steering wheel pull the steering wheel and you will see a copper ring the horn is connected to ground out that copper ring against the steering column if the horn sounds you have a worn contact I fixed mine by putting a spacer under that copper ring good luck with it
most toyota relays dont go out in my 16 years ive never seen one go bad unless its got water to it it is located on the left sids of the steering colom my advise would be to check the horn ground (where it bolts to the body or find a horn htat you know works and try that if this doesnt help contact me via e-mail [email protected] thank you
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