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My horn won't work on my 2007 Uplander. Checked fuses, and wiring and everything is fine. What could it be?

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  • Cars & Trucks Master
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By check ,what do you mean ? Did you test for B+ voltage at the horn relay with a DVOM - digital volt ohm meter ? Checking the electrical ciruit is the way to find the problem ! Was there B+ voltage across the horn fuse ? Watch this video .
VEHICLE RELAYS Operation Diagnosis The horn relay is in the fuse/ relay center under the hood in the engine compartment .
Is the air bag light on ? If it is could have a clock spring problem . The clock spring is inside the steering column under the steering wheel , it is used to connect the horn switch ,air bag module and any other button's on the steering wheel , CC , radio etc...

Posted on May 12, 2017

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  • Cars & Trucks Master
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This is caused by a loss of connection in the coiled ribbon contact under the steering wheel called the Clock Spring contact. Before you remove the steering wheel to replace this contact drum you MUST DISARM the Airbag system. Failure to disarm the system can result in serious injury or in rare cases *****.

Posted on May 12, 2017

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Posted on Jan 02, 2017

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SOURCE: Would appreciate help for a Toyota Corolla 2007 non-working horn.

If the horn works with direct connection, and fuse, relay, and circuit breaker are all good, it's the switch in the steering wheel. If it is anything like the chrysler auto's, the switch and the air bag module is all one unit, can't replace just the switch, the whole thing, and it's about $700 to $800 for those units, at least it is here, and can only get them at a dealer.

Posted on Mar 24, 2009

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SOURCE: merecedes sprinter 313 cdi. horn not working.

The wiring loom that runs down the front near the radiator and intercooler is prone to rubbing and corroding and shorting out. Check this loom.

If it is in bad shape i'd recommend replacement as the turbo boost sensor wiring and some of the headlamp wiring is in this loom also, and these can cause costly problems and cause the turbo to fail if not replaced.

Posted on Mar 28, 2009

  • 10 Answers

SOURCE: Rear wiper does not work.

Exactly. Not much else can go wrong. Located motor/pull and replace. Should be easy and inexpensive. No need to go to the dealer. Napa parts will be fine for this. Only other option I can think of is the switch...

Posted on May 03, 2009

  • 1 Answer

SOURCE: 1989 toyota pickup horn not working, fuse is fine.

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

Posted on Dec 12, 2009

johnjohn2
  • 5763 Answers

SOURCE: Chevy Avalanche horn stopped working

you may have bad horn, take a test light and see if power is going to horn when horn is pushed, if theres power going to it then you have a bad horn,if theres no power to it then check the horn relay. but il bet if the fuse is good then the horns are bad.

Posted on Mar 01, 2010

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Horn won't work. and already checked fuse.


the problem may be that the horn is faulty or the horn button on the steering wheel is not making contact, check for loose wires & connections, to check the horn remove the wire(s) from it then connect a wire to the positive terminal of the battery then to the horn if the horn is OK it should work if not it is faulty & will need replacing,if the horn has two wires to it you will need another wire from the negative terminal of the battery to the horn as well........hope this helps......cheers

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on the back door at the top is a rubber connection hose ,well this is the protection for the wires and i think it needs looking at ??

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Rear wiper does not work.


Exactly. Not much else can go wrong. Located motor/pull and replace. Should be easy and inexpensive. No need to go to the dealer. Napa parts will be fine for this. Only other option I can think of is the switch...

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Would appreciate help for a Toyota Corolla 2007 non-working horn.


If the horn works with direct connection, and fuse, relay, and circuit breaker are all good, it's the switch in the steering wheel. If it is anything like the chrysler auto's, the switch and the air bag module is all one unit, can't replace just the switch, the whole thing, and it's about $700 to $800 for those units, at least it is here, and can only get them at a dealer.

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The power outlet under the cup holders


check these fuses:

under the hood fuse panel:

#23 - auxiliary power
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instrument panel fuse panel:

#29 - retained accessory power

if these fuses are good and they have power at the fuse panel, the outlet itself may be bad. if your inclined and you have a test light you can check to see if the outlet has power going to it by probing the wires on the back of the outlet if you can get to them. test the red and white wire for 12v positive and test the black wire for a good ground. if those wires test ok then it its the outlet itself that is bad. if the wires do not test ok then there is a break in a wire somewhere which will have to be traced and repaired

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