The single wire from the horn is a +12V feed. When you apply power to it, the horn should sound (it is case grounded).
I am trying to hook up the original horn button on my steering wheel. The horn is now working properly through a small aftermarket button setup that is mounted to the floor shifter. It has a hot and a ground wire. I've replaced all of the original horn parts in the steering wheel. The original horn button seems to work mechanically. (Pops back after pressing.) The horn has one wire coming from it and goes through the firewall and I am assuming that is the ground that goes to the aftermarket button. The other is hot and is (hot) all the time.I can't find a relay. Is there a connector that connects the original column wire somehow to those two wires now connected to the aftermarket horn button?
Thanks in advance.
Mark
Can you clarify what the highlighted things are? It is not clear how things are currently wired.
In its simplest form, I think you have what is pictured below. The switch has a "ground" wire and a "hot" wire.
If you are using a voltmeter, the side of the switch going to the horn will measure as ground because there is no voltage potential across the horn.
If that is what you have, then we help you sort out the stock horn.
