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post #1 of 14 Old 03-31-2019 Thread Starter
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Horn stopped working

Hi, today my horn stopped working. I have a 2008 Touareg 3.0 TDI. I checked the fuses which looked okay, although I am not sure I checked the right ones. Anyone got a fuse schematic for this model? I have also read it could be a problem with the horn itself, apparently taking off the front bumper and spraying some WD40 up the horn and waiting a day before laying on it again is a possible fix. Another possibility is the ground and connecting wires from the battery have come lose. Am I missing something here? My access to good tools to remove the front bumper is somewhat limited. I’m really hoping its just a fuse but I dont know which one.

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post #2 of 14 Old 03-31-2019
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Use a meter to see if you're getting signal to the horn... if not, start looking at fuses and wiring.
If you do get a signal, then the WD-40 approach can be entertained.
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post #3 of 14 Old 03-31-2019 Thread Starter
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Originally Posted by TurboABA View Post
Use a meter to see if you're getting signal to the horn... if not, start looking at fuses and wiring.
If you do get a signal, then the WD-40 approach can be entertained.
I have one of those screwdrivers that lights up if i touch something to show signal. I assume I would need to take off the front bumper and find the wires from the battery to the horn to test this?

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post #4 of 14 Old 03-31-2019
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Before you do anything else try the WD40 fix. It costs nothing!

VW Touareg models are as follows:
Generation 1: T1 is model 7LA & facelift T2 is model 7L6
Generation 2: T3 is model 7P5 & facelift T4 is model 7P6
Generation 3: T5 is model CR7 [Not available in "VW Atlas" North America!]
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post #5 of 14 Old 03-31-2019 Thread Starter
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Originally Posted by noobytoogy View Post
Before you do anything else try the WD40 fix. It costs nothing!
Okay, just not sure how to get to the horn exactly.

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post #6 of 14 Old 03-31-2019
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Do you know what the horn looks like?
Do you know what are you should be looking in for it?
Do you understand what it would take for the horn to function?
You need some basic knowledge before you can fix something.
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post #7 of 14 Old 03-31-2019
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Quote:
Originally Posted by drewbreezy View Post
Anyone got a fuse schematic for this model?
2005-2010 Volkswagen Touareg Fuse Box Diagram » Fuse Diagram
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post #8 of 14 Old 04-01-2019 Thread Starter
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Quote:
Originally Posted by TurboABA View Post
Quote:
Originally Posted by drewbreezy View Post
Anyone got a fuse schematic for this model?
2005-2010 Volkswagen Touareg Fuse Box Diagram » Fuse Diagram
Sweet, thank you. Now I can’t seem to find the one that reads horn.

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post #9 of 14 Old 04-01-2019 Thread Starter
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Quote:
Originally Posted by TurboABA View Post
Do you know what the horn looks like?
Do you know what are you should be looking in for it?
Do you understand what it would take for the horn to function?
You need some basic knowledge before you can fix something.
I do know what it looks like. I also know I have to take off the front bumper to get to it. I do not know however the engineering mechanics of how a horn works. I was hoping to spray some WD40 up in the trumpet and hope for the best.

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post #10 of 14 Old 04-01-2019
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For one, there are actually two horns: a high and a low pitched one. If you've no horn at all, that means that the second one has also failed.

The horns are known to die after a while. So, even though of course check fuses and such, but it will be most likely the actual horn that has died on you. You can try to get it back to life with WD40, but don't get up your hopes up on that.

You also can't take the horn apart without destroying the housing - so, even if you would be able to repair it by taking it apart, it will most likely die on you in a short time afterwards, because of the housing not sealing properly anymore.

The workshop manual says to remove the bumper first to replace the horns, but you can replace them without that (thanks to the holder arms), if you have small enough tools and hands.
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