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Post by larry9j on Jul 31, 2013 17:23:57 GMT -5
Hey Guys,
Getting this thing ready for paint and today I hooked up two brown wires to the horn, instant and constant sound. Switched the two brown wires side for side. Same problem constant sound.
There is a solid yellow coming out of the steering column which was
not connected, I connected it to ground, same as before, constant sound, grounded or not.
I then removed the steering wheel and the GTll horn button, and unhooked the yellow wire, still horn sounds all the time.
anyone with any ideas?
Thanks,
larry9j
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Post by Dan MacMillan on Jul 31, 2013 18:49:55 GMT -5
You just answered the age old question, if you hook up a horn backwards does it suck instead of blow. No they blow either way. Just like a reverse wired light bulb will not create a black hole.
vw horns are fed constant power and grounded through the steering col via the horn button. Your ground wire is obviously grounding prior to reaching the button.
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Post by jspbtown on Jul 31, 2013 18:50:58 GMT -5
OK...so what are the two brown wires? Do they both have power? Is one a ground and one a power? Do either go to the horn button?
How many tabs on the horn? 1 or 2?
If I had to guess I would say one of the brown wires has constant power and the ground to activate the horn comes from the yellow wire. So to wire correctly (if it has two tabs on the horn) you would hook up the brown wire with power and the yellow wire.
Just a guess since it can be wired any way and I don't know what the wires have as far as power or ground.
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Post by Dan MacMillan on Jul 31, 2013 20:39:35 GMT -5
VW color codes state that all brown wires are ground, black is ignition power, power to horn should be a black/white orblack/yellow with the brown going to the horn button through the signal sw harness where it terminates in a spring loaded pin that slides against the ring on the back of the steering wheel, this ring connects to the horn button. The horn button when pressed completes the ground through the steering shaft. A jumper around the shaft to steering box rag joint finishes the path to the chassis. Without the jumper, the steering shaft is isolated from ground. Here is a typical diagram  |
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Post by Wyn on Aug 1, 2013 11:46:19 GMT -5
Here is brief schematic of the GT 2 horn circuit. At any point from the horn to the steering column if the wire is grounded the horn will sound. There is 2 or three different steering column. The one that is normaly used has an insulated ring and slip contact that the brn wire at -s connects. From the slipring there is a wire that that feed out to the steering wheel. All the wire to this point must not connect to ground. This wire at the steering wheel will connect to the horn switch and the other the other contact will connect to the metal shaft of the steering system which is at ground potential. Check for any wire that is connecting to ground anywhere along this circuit and check to see if the horn button is shorted.  |
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Post by jspbtown on Aug 1, 2013 12:04:52 GMT -5
Using Wyn's diagram it seems that somewhere along the way the brown wire that goes to the column is contacting a ground. It should remain neutral until you press the horn.
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Post by Big-birds-ride on Aug 1, 2013 12:49:13 GMT -5
My GT 1 had a similar problem. There were two horns installed under the front of the car, both fed with a brown wire. Was working on it and lowered the jack and when the tires hit the floor both horns started blaring. Turns out the problem was my horn button on the steering wheel. Replaced the button and all was well.
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