Ok I have a 2000 jeep cherokee, 4.0 4x4. The horn will not stop unless I undo the relay. I have replaced the clock spring, horns, relay, fuse box, air bag contact. I have tried disconnecting the contact plate, still blows. I have disconnected the clock spring, still blows. the only thing that stops it is pulling the relay. please help. Next step is a gage...click click boom

 

Idk man that's a pretty bad problem! Keep the relay out and hardware it to push button prolly easiest fastest and cheapest way

 

Have you traced all the horn wires to see if any of the coatings have worn away, creating a short?

 

try different relay they can stick

 

Who needs a horn that's what middle fingers are fr

 

traced the wires under the hood, they are in good shape. I have tried 4 diff relays now, no joy. I need the horn to pass instection. I might end up having to use a rigged horn system, but that does not cure the underling problem. I could be happy if it was the clock spring that cost 235.00 but not knowing is killing me

 

Throw some earplugs on, let the horn blare and play with the wires to see if you can get it stop. Push, pull, tug, etc. on wires, buttons, mounts, and see if it will stop.

 

that is justt about crazy enouf to work......but I have after market air horns as in 2 of them.....neighbors might have a problem with that. Most of the time I would not care, but one is a cop and the other is a ret. nam vet.

 

Yeah, what he said.

 

youve had the steering wheel it self apart where you would push it correct...

 

Disconnect at the horns and have a helper (maybe neighbor wanting this problem fixed also) hold a test light on the connector where the horn plugs in, then jiggle, grab, poke, prod, and anything else you can think of until the test light cuts off. Worst case scenario put a set of train horns on, the neighbors will think it's a train not you.

 

where can i find the thing that the arrow is pointing to?

 

look up while sitting indrivers seat

 

You have a short to ground somewhere on the circled part of the circuit. Since it's grounding out, it allows the relay to energize and send power to the horns. You need to start digging around in the cab and see where it's grounding out on the body. Have fun!

 

I apologize for resurrecting an old thread, but did you ever get this figured out? Today my 2000 XJ started doing the same thing. I was just chilling at home watching TV when horn started up and kept on going until I managed to disconnect the battery. I have another car to drive thankfully while I troubleshoot this.

Last weekend I removed my saggy headliner to hunt for leaks and found that my windshield seal is leaking pretty bad. It's rained all week so the interior of my jeep is quite damp... so I'm guessing based on the feedback in this thread so far that the water is somehow triggering my horn relay?

Any advice/input is welcome. I'll just let it sit off-battery until the weekend and troubleshoot it then. It sounds like the next step should be pulling the horn relay? I pulled the horn relay fuse (I think) but it didn't seem to stop the horn when I was frantically trying to stop it.