Help! My horn works with car off and NOT on?
08-15-2007, 04:30 PM
#16
Racer
Thread Starter
Originally Posted by Doug Donsbach
That's just odd. Just spent a few minutes with the schematics, and I can't see how that happens, because:
- Horn relay contacts and coil are supplied with constant-on fused power via 25A fuse #3 in fuse holder B.
- Horn button simply grounds the other side of the relay coil, pulling in the contacts and supplying horns with the fused power.
It doesn't get much more simple than that. The wheel isn't by chance a tiptronic wheel, is it?
- Horn relay contacts and coil are supplied with constant-on fused power via 25A fuse #3 in fuse holder B.
- Horn button simply grounds the other side of the relay coil, pulling in the contacts and supplying horns with the fused power.
It doesn't get much more simple than that. The wheel isn't by chance a tiptronic wheel, is it?
It just makes no sense. You either have the circuit grounded or you don't. It has constant power....
Since you looked at the circuit, where does the ignition switch come into play AT ALL?
Since the airbag is right there, is there anythign related to that?
08-15-2007, 04:52 PM
#17
ok... the horn relay is energized when the horn button is pressed and ignition is off... this is confirmed by the horn beep.
if you press the horn button while similtanously turning the ignition to on position... the horn shuts off.
to me logically those two circuits are somewhat shared... somehow. hence my suggestion to take it apart and starting from scratch... such as the original wheel, just going through the troubleshooting motion
if you press the horn button while similtanously turning the ignition to on position... the horn shuts off.
to me logically those two circuits are somewhat shared... somehow. hence my suggestion to take it apart and starting from scratch... such as the original wheel, just going through the troubleshooting motion
08-15-2007, 05:03 PM
#18
Racer
Thread Starter
Originally Posted by redridge
ok... the horn relay is energized when the horn button is pressed and ignition is off... this is confirmed by the horn beep.
if you press the horn button while similtanously turning the ignition to on position... the horn shuts off.
to me logically those two circuits are somewhat shared... somehow. hence my suggestion to take it apart and starting from scratch... such as the original wheel, just going through the troubleshooting motion
if you press the horn button while similtanously turning the ignition to on position... the horn shuts off.
to me logically those two circuits are somewhat shared... somehow. hence my suggestion to take it apart and starting from scratch... such as the original wheel, just going through the troubleshooting motion
The horn is not connected to a variable power source, it is direct with the battery...
Somewhere, somehow, there has to be a wire crossed or something it seems. However, if when the ignition is switched, power is given and if it is touching the horn pad, when the horn is grounded, it would still ground the circuit and potentially other circuits switched to the ignition?
08-15-2007, 05:04 PM
#19
Drifting
I spoke to 2 mechanics and they had never seen this. To make a long story short. I said both wires were ground wires for the horn. Wrong. The short wire that goes to the steering wheel is the ground for the air bag. The long wire to the horn plate is the horn ground. We know the horn plate wire is hooked up properly because your horn works.
One of the mechanics said to make sure the connector for the air bag ground wire is properly seated. That is his wild guess. One mechanic thought maybe a bad ignition switch, but the other mechanic did not think so.
Pull the air bag and double check both ground wires. Pull them off and put them back on.
One of the mechanics said to make sure the connector for the air bag ground wire is properly seated. That is his wild guess. One mechanic thought maybe a bad ignition switch, but the other mechanic did not think so.
Pull the air bag and double check both ground wires. Pull them off and put them back on.
08-15-2007, 05:18 PM
#20
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I can see how it might happen if you don't have horn contact 1 connected to the brown wire going to the ground point (GP). In that case, maybe you have a floating ground from the airbag or something with the key off. And then the ground lifts when the key goes on.
From the schematics for a 1999:
From the schematics for a 1999:
08-16-2007, 07:19 AM
#23
Racer
Thread Starter
Originally Posted by 99firehawk
alarm horn is diffrent then the traffic horn
but i have seen that before
multifuntion switch fixed it twice
but i have seen that before
multifuntion switch fixed it twice
08-16-2007, 02:55 PM
#26
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Originally Posted by Loren
They two separate horns. The traffic horns reside behind the front bumper.
The alarm horn resides next to the battery.
The alarm horn resides next to the battery.
