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Re: Horn wiring conversion - abs to non abs Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Sat, 24 May 2008 21:09:56
In Reply to: Horn wiring conversion - abs to non abs, SPGx2, Sat, 24 May 2008 18:45:16 Members do not see ads below this line. - Help Keep This Site Online - Signup |
On the older cars, the single wire connected to the horn switch, and the other side of the switch connects to the steering column, which was chassis ground. Close the switch, and the one wire connects to ground. This closes the lower leg of the horn relay, and the relay sounds.
In later years, they didn't use the steering column as ground; instead, one of those black wires is ground, the other connects to the horn relay. When you tied the two wires together, you grounded the horn relay, turning it on constantly. As you found out.
The horn switch has to have two connection - otherwise it's not a switch, it's a radio antenna. First, figure out which wire connects to the horn relay. That's easy. Touch each wire to chassis ground, one at a time. One will do nothing, one will sound the horn. The one that sounds the horn is your winner. The other is ground.
You already have your answer. Connect the wire that sounds the horn to the horn ring. Connect the other wire to where the wheel bolts to the steering column. The steering column isn't presenting a good ground. The wheel is held on with a big bolt, probably with a washer. Trapping the (stripped) end of the ground wire under the washer will do the trick of grounding the steering wheel. Theoretically, you could put either wire to ground and the horn ring, but if the steering column did pick up a ground, you'd get the horn all the time. Or probably only at 3 am.
posted by 76.202.162...
, Sat, 24 May 2008 21:09:56 <-- Viewing This Message
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