The horn of my tacoma has recently stopped working.
Well its either the fuse, the wiring, the horn itself or the switch.
Have you checked the horn relay to see if it is working ?
SOURCE: the horn on my truck stopped working
Check your fuses first for a blown fuse. Also try to recall last time you used the horn, and if it sounded muffled, quieter than normal or just not right, and if it was acting up it's more than likely the horn, wich is located under the bumper by the fender usualy. Also remove your horn button on the wheel, and make sure the wire is conected, and intact.
Hope this helps, Good luck!
SOURCE: Horn/lights on 2002 Toyota Tacoma
Rewire your horn from the steering wheel to the horn. Its not difficult, I can't tell you how to take the steering wheel apart but you can get a Haynes Repair Manual. It'll have all you need and more. You can use speaker wire, split it in two. Run one cable from the positive in the battery to the horn switch in the steering wheel. Another from the switch to the horn. You have a short somewhere, to me is easier just to run new wires than to find the short-circuit. Make sure when you run the cables through the firewall you run through a grommet so it does not get damaged by metal. Before anything check your headlight wires that they are not touching the horn.
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