Car Horn

A sticking horn button shorting out air bag coil shorted out horn or a pinched or chaffed wire somewhere. Do you have a multimeter?

So if you plug the horn button back in you unplugged does the horn come back on and stay on without pressing the horn button?If so then looks like a bad horn button.

I posted a wire diagram so you can see how it goes pretty basic if the horn only goes off with the switch plugged in then its the switch if it was shorted to ground somewhere else unpluging the horn switch would have no effect on the not going off. You have two horns so one of them isn't working. Unplug the working one then plug the horn button back in and make sure there is a ground to the black wire and a power to the dark green wire to the horn that doesnt work. If thats what you got you need check terminal tightness if thats good you need to replace that horn. As far as the horn button I haven't had much luck repairing those. Is the horn button part of the air bag on that car?

That sucks then looks like its a air bag replacement.

If you look at the wire diagram the horn switch sends a ground thru the slip ring which is the horn relay trigger then the relay sends power to both horns. Thats why I said if you plug the horn switch in and the horn goes off and you unplug the horn switch and the horn turns off. That it would be the horn switch sending the ground to the horn relay to trigger it. If that wire was shorted to ground some where else the horn would stay on even with the horn switch unplugged. Also since only one horn works sounds like the other horn has gone bad or the power or ground wire to it has a problem. See if the black wires to the horns have a constant ground then with the working horn going off see if the none working horn has power to the green wire. Your going to have see if the black wire to the horn relay is grounding out somewhere or the relay itself sticking the contacts in it. You might try swaping the horn relay out.

Alright so now the horn is going off with the horn switch unplugged?

So the black wire that goes to the horn switch?It again looks like a horn switch when you look at the wire diagram the switch gets the ground thru the steering wheel. So is the air bag mounted when the horn switch is plugged in and the horn is going off?

Then you could have that black wire getting grounded between the air bag and the steering wheel. That black wire is getting grounded somewhere that triggers the horn relay.

That wire that goes thru the screw hole supplies ground to the horn switch. Then when you press the horn button it connects to that ground wire thru the slip ring down to the trigger side of the horn relay. So somewhere between the horn button and that slip ring it grounding.

Lets do this take out the air bag fuse then unplug the yellow connector at the base of the steering column thats your slip ring/air bag coil then see if the wire that comes off your horn switch is sending out a ground without pressing the horn button. If you do then unplug the black wire in the screw hole and see if the ground goes away.