While I have been trying to diagnose various items on a new to me project Jeep (01, 6cyl, 5 speed), one of which is a possible bad clock spring. I have several symptoms that indicate that may the case. While trying to source a part, I was working on some other items and realized there may be more issues with my horn (it’s currently not working). I found a blown fuse under the hood and went to install a replacement and the horn started going off. After reading some additional threads on horns, I thought I could have a stuck horn switch. I pulled the airbag/horn button off to see what I could test. I did a continuity test on the red and black likes seen in this photo which I believe go to the horn “switch” and had continuity. I’m assuming you shouldn’t have that if the horn button is functioning correctly. Am I assuming correctly?
Question on horn (possible stuck horn switch)
- Thread starter rebelles
- Start date
Not normally on here much, but fixed this on my jeep... If you have continuity there, it's because the horn switch on the interior is stuck closed... I found a whole replacement airbag unit that worked fine, for about $50 online and reinstalled that - fixed the issue.
To test whether the rest of the circuit is functioning properly, take a test light connected to ground and touch the female side of where the red wire connects to. The horn should blow and if it does, everything downstream is working fine.
I was thinking about doing something like that as well this evening. I found a used airbag assembly for reasonable price and have it ordered.
What’s the closest good ground to the steering wheel? Would the tip of the steering shaft work to do the test or should I run a wire to somewhere near/in motor compartment?
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Probably the door jam. I'm not sure without poking around. You could rob power off the obd2 port or cigarette lighter while you poke around for a good ground. Hell, the sidewall of the cigarette lighter would probably work, but test it first.
Follow-up - I removed the airbag again and installed a new 20a fuse for the horn. Then I ran a long wire to the ground side of the battery and touched it to the white wire coming out of the clock spring and the horn went off. So that further confirms the horn switch in the air bag assemble is stuck/bad.
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