My horn doesn't honk..

Possibly an errant theft alarm??

Seems like a steering wheel issue, slip ring contact

I pulled the center out of the steering wheel and grounded the horn contact. The horn honked like it should. This is on our 2006 KIA Sedona. The horn used to work once in awhile, but not at all now. This leads me to believe that the clockspring in the steering column is defective. I will call the dealer on Monday to see if there is a warranty fix, but I doubt that there is.

I believe there are 2 wires to the horn. One is power all the time, and the other is ground through the steering column wire to the horn button on the steering wheel, when it grounds out when pushed.
If it is a single wire to the horn, then there is a relay.

I wish others had responded to your 8Toyota pickup horn problem as I have exactly the same scenario. I am trying to find an accurate wiring diagram.

I replaced the horn relay which is located inside of fuse panel under the hood of car on the firewall, have someone push button to be able to hear a clicking sound coming out of the correct relay, then trade out relay of the same and see if horn works

check the horn connection. You will need to remove the center cover from the steering wheel. You should see a lone wire with a connector end that mates to a tab. When this makes connection the the center of the steering column (ground in this case) the horn sounds. I would think that if you removed the steering wheel center cover you will readily see and be able to fix the problem.

This is not a hard job, just look the the underside of the steering wheel for the screws that need to be removed to release the cover.

Good Luck

find the horn ,it should be at the front possibly behind the bumper ,run a wire direct to it and see it works ,if it does work then its the wiring in the steering wheel ,but as this vehicle no doubt has an air bag then entrust this job to a garage because if you get it wrong the air bag will explode ,expensive job to say the least

sounds like there is something in the wrong place in the horn button. it makes contact when you turn left just as if you had pushed the horn button. i wonder does your airbag light ever come on, i mean not just in the startup sequence, that's normal. probably you need to take the horn button part of the steering wheel apart and get things back in the right place or maybe replace some parts, but because of the airbag being right there too it's not something i would recommend that you do yourself. accidentally setting off an airbag is not a good thing.

since heat caused the problem, i used cold for the fix.....there are several types of canned "FREEZE" that are used for electronic testing...i sprayed the steering wheel--twice. i think it released the weight of the steering wheel cover on the horn contacts...that or my prayers were answered......whatever the fix----currently AIN'T BROKE.....