On Jan 9, 11:08*pm, "Mr. K" > wrote:
> In article >,
> *Jan Andersson > wrote:
>
>
>
>
>
>
>
>
>
> > On 1/9/2012 5:15 PM, Mr. K wrote:
> > > I'm trying to get the horn button in the center of the steering wheel
> > > working again.
> > > there are 2 wires under the button one is (grounded) down the tube and
> > > the other seems'
> > > to connect to" brushes" the make contact while the wheel is turning.
> > > the Q. is where does this second wire go? can I find it under the bonnet?
> > > what color might it be. Brown? it's a spaghetti system to be sure.
> > > HELP!
>
> > It may help you understand the horn wiring to know that it gets constant
> > 12V and the horn button breaks the ground contact, a bit unusual being
> > "backwards" compared to most electrical things you find in cars...
>
> > First measure the wires going to the horn. One should have constant 12V..
> > The other is your horn button wire that should have no power or ground,
> > unless the horn button is pressed.
>
> > There needs to be a "jumper" wire at the base of the steering shaft that
> > jumps over the rubber disc coupler (a.k.a. rag joint) to the steering
> > box side of the shaft. Check that. And there should be another wire
> > attached to the steering column tube right where it ends under the fuel
> > tank. This spot is prone to rusting too.
>
> > Jan
>
> Why , thanks. what I have found is someone apparently spliced in some
> wires and didn't stick to the color code. It's a challenge.
> --
> Karma, What a concept!

Here's a good link about horn wiring:

http://www.vw-resource.com/horn.html#wiring