Ghost Horn ?
Thread Starter
Three Wheelin'
Joined: Jun 2005
Posts: 1,741
Likes: 1
From: Bournemouth, Dorset, UK.
Ghost Horn ?
Hi All 
I have just changed my steeering wheel to a Momo Type blue/black wheel with a squared off bottom.
Since then whenever i turn the wheel roughly one inch to the right whilst driving it beeps quietly around 1 time in 3
I have removed the horn push in centre and taped up live feed and it STILL does it lol.
I have to assume there is a live short somewhere further along the circuit but NOT at the wheel...
Hoping someone can point me in a possible direction if they have had this problem before.
Also the horn has never been particularly loud....is this normal ?
All the best Brett
928 S2 86 4.7
I have just changed my steeering wheel to a Momo Type blue/black wheel with a squared off bottom.
Since then whenever i turn the wheel roughly one inch to the right whilst driving it beeps quietly around 1 time in 3
I have removed the horn push in centre and taped up live feed and it STILL does it lol.
I have to assume there is a live short somewhere further along the circuit but NOT at the wheel...
Hoping someone can point me in a possible direction if they have had this problem before.
Also the horn has never been particularly loud....is this normal ?
All the best Brett
928 S2 86 4.7
Racer
Joined: Nov 2008
Posts: 296
Likes: 10
From: The Netherlands, Zwolle
I have about the same problem, but the problem is in the wheel. I just replaced the wheel with one in a better condition. I went from a 3-spoke old-school 928 wheel to a 4-spoke 'luxurious' 928 wheel with the rectangular pad in the middle. After the change I got the ghost problem. When I turn the wheel it sometimes enables the horn briefly, which makes for some very inappropriate situations. Could anyone point me in the right direction?
Thread Starter
Three Wheelin'
Joined: Jun 2005
Posts: 1,741
Likes: 1
From: Bournemouth, Dorset, UK.
I have about the same problem, but the problem is in the wheel. I just replaced the wheel with one in a better condition. I went from a 3-spoke old-school 928 wheel to a 4-spoke 'luxurious' 928 wheel with the rectangular pad in the middle. After the change I got the ghost problem. When I turn the wheel it sometimes enables the horn briefly, which makes for some very inappropriate situations. Could anyone point me in the right direction?
Eventually I gave up trying to trace my "ghost horn" and mounted a separate horn button on the dash...
All the best Brett
Drifting
Joined: May 2001
Posts: 2,747
Likes: 3
From: Owasso, OK
The horn ground wire runs from the horn up through the shaft between the steering wheel and universal. It sounds like the insulation on your ground wire has worn off the insulation where it enters the steering shaft. Turning right reduces the slack and causes the exposed wire to complete the horn circuit. Time to relace/or repair the ground wire.
Dennis
Dennis
Team Owner
Joined: May 2004
Posts: 31,228
Likes: 4,215
From: Philly PA
The problem is most likely a mis adjusted turn signal switch, if you remove the column cover on the bottom you can see the turn signal switch and its horn contact , if the switch is not pressed down on the column shaft then it can bind and contact other parts of the steering wheel and then if it touches metal it will beep the horn.
AFAIK there is not any wire running down the steering shaft.
The horn wire goes to the flat brass contact on the turn signal switch and then to the horn ring on the back of the steering wheel, this then goes to the back of the horn button that when pushed completes the ground.
By lying on you back you loosen the switch and push it away from the steering wheel ring so that the other parts wont make contact except for the horn ring on the back of the steering wheel.
You may also have to bend the flexible brass flap away from the new steering wheel as it could be touching completing the ground.
AFAIK there is not any wire running down the steering shaft.
The horn wire goes to the flat brass contact on the turn signal switch and then to the horn ring on the back of the steering wheel, this then goes to the back of the horn button that when pushed completes the ground.
By lying on you back you loosen the switch and push it away from the steering wheel ring so that the other parts wont make contact except for the horn ring on the back of the steering wheel.
You may also have to bend the flexible brass flap away from the new steering wheel as it could be touching completing the ground.
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