In the last few months, I had 3 or 4 incidents when the horn would sound continuously and I had to tap the switch (in the airbag area) a couple times to get it to stop. Finally, it went off spontaneously and I couldn't get it to shut off at all without pulling the fuse. I'm driving it now without a horn and would like to get it fixed. My mechanic said that about all he could do was to get an entire junk assembly for $800-$1000 and replace the switch. I'd like to investigate it further before dropping that kind of money into it. Can I safely remove that center console on the steering wheel, and I assume that means removing the airbag assembly, to see if the switch can be repaired? Can I just buy a new switch, which I assume is some kind of diaphram? Any ideas on how to get my horn back for under $1000?
I have the same problem. I pulled the fuse out, in the box under the hood, on the passenger side of the engine, by the coolant overflow. It killed my horn issue.
Funny enough, the only part of my horn that I miss is the beep when locking my car. I don't really use the horn and perhaps when some idiot cuts me off one day, I'll be sorry.
I just had my AC Rad fail, and fixed that today. I am picking up my Jeep tomorrow, and have asked the mechanic if he has any ideas.
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The clicking you hear is the horn relay working.
I would locate the horn and insure the wiring is intact and the horn has a good solid ground.
Then while someone is pressing the horn button measure the voltage at the wire that attaches to the horn to ground. If you get 12v or more the horn is bad. If you don't get any voltage replace the relay
To Larry Crowley,
Did you ever correct the problem to your 2000 Jeep Grand Cherokee and did you in fact determine that the problem was in fact the Body Control Module (BCM)?
I too have a 2000 Jeep Grand Cherokee Ltd with 162,000 miles. Up until just a few months ago, I never had any major problems with the car however in early December one evening the car was turned off and parked in my garage and the horn just went off out of nowhere, a solid horn...it was deafening! We unplugged the battery for the night so it wouldn't drain the battery. The next day I took the car to the mechanic who replaced the horn switch and relay. We thought that had fixed the problem. An hour after I left the mechanic with the car both the BRAKE and ABS lights on my dash went on and my speedometer stopped working (very scary to drive that way). When I stopped the car and went to lock it with my keyfob, the solid horn went off again so obviously the problem was not the horn switch and relay!?!? Over the past few months I have had my car to three different mechanics as well as the Jeep dealer and they have all concluded that the problem must be the BCM but they said that the only was they can properly diagnose the car is if it is acting up with the above mentioned symptoms while in the shop. Unfortunately it only acts up intermitently, not all the time. I am at such a loss. Currently we have removed the fuse for the horn so I am driving with no horn which is extremely unsafe! I look forward to any advice you have in this regard. Thank you!
Check fuse first. Then run a continuity check with a volt meter on the wire going from the fuse box to the horn. If that test is ok then check the horn itself or replace it. Sounds to me like maybe power is not getting to your horn, not plugged in or fuse is blown.
You should check to see if you have power at the horn first. If you do, you need a new horn. I believe there is also a relay involved. Sometimes these are interchangable. You can take a relay like the one for the A/C and swap it with the horn one and see if the horn works. That will at least eliminate the relay.
Under the hood of your jeep on the passenger side there is the Power Distrubution Center (PDC). Remove the lid and thered will be fuses and relays in there. I could not locate the exact location of the horn reley, but if you start removing them one by one you can find the horn relay. You will know the right one when the horn stops.