Yep there's a million posts about fixing Jeep Wrangler horns that aren't working and the clock spring being a possible culprit etc. etc. Being unfamiliar with these Wranglers I'm still a bit confused
First, where's the horn fuse for a '98? :-) I've looked inside the glove box fuse compartment and none of those are labeled "horn." I've also looked at the fuse/relay compartment as described in this thread: http://www.wranglerforum.com/f5/fuse...it-118626.html
. I don't see any fuse for the horn. One person said the horn doesn't have fuses, only relays. I don't buy that. (the fuse labeling behind the glove box for our Jeep doesn't match the labeling in the above link. For example, we have fuses 3 and 4 labeled as for the Airbag. And those were missing so I put new ones in.)
Back to the horn fuse: is there a fuse for the horn relay separate from the fuse for the actual horn?
I tried switching out the horn relay with the other two relays that matched it. Still no go on the horn. However, given this schematic of the relay:
Jeep Wrangler TJ Horn Relay | Wiring Diagram Circuit
it seemed pretty clear to me that connecting 30 with 87 (pin 3 with pin 5) I should hear the horn. I tried shorting between these two but...no horn. I put a meter on the horn leads and sure enough, there was no voltage with those pins shorted.
I also tried measuring the voltage across the coil of the relay. It seems to me if the horn button and clock spring (and fuse) are all working, I'll see a voltage across that coil when I press the horn button. I didn't see any voltage then, though.
So I get no voltage to the relay. But when I short across between the normally open terminal of the relay and the common, I still get no horn. So do I have two problems: clock spring/horn-button and....??? fuse??? Where does the common of the relay get its power from?
The only think I know for sure is that the horn itself works; I directly connected it to the battery to confirm this.