horn not working

Note the diagram for horn. Check the fuse, also, use a test light on fuse, should be hot all the time. See the horn relay, unplug it, use proper jumper wire between those two terminals on switch side of relay, right side in the diagram, the horn should sound, does it? If so problem should be on control side of relay, left side in the diagram. The control needs voltage and ground. The bottom wire is ground, on left side, the horn clockspring--horn switch--wiring in steering column, is all part of ground circuit for control side of relay. Check voltage and ground.

Have a look at the accessory fuse for the horn. If that is not needing replacement you could run a jumper wire to the horn to test. If that does not work your clock spring in the steering wheel may have an issue. Good Luck!

horn may need a good ground