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push on the horn button you should hear a click noise. is so then the circuit to the relay and the relay is good. then you find the horn and check for power to the horn with the horn button pushed. if you do then the horn is bad.
Find the wire at the bottom of the steering column that comes down from the horn button, or locate the wire at the horn relay.. Cut this wire and splice it to a wire that goes to one side of a push button switch. Connect the other side of the switch to the metal chassis of the car, which is ground. A metal part of the dashboard frame will usually work.Then when you press the button, it will activate the relay and sound the horn.
The best thing to do is, find horn,disconnect the wiring plug. and run a wire from battery positive to the horn itself. if the horn works then its in the wiring or the button itself. you may have to ground the horn.
it could be a fuse but most likely its the horn itself were the diaphram has dried out and not vibrating.with someone pushing on the horn button you can tap on the horn to see if it might make a noise.if it does then it needs to be replaced.you can also check for power to the horn with a test light and if it lights up when someone pushes on the button.if it does and the horns not working then again the horn needs replacing.there is a horn relay in the system but it rarely goes bad as well as the horn button rarely goes bad.
The horn works when the horn button is pushed...breaking the circuit or removing the ground from the horn. The wire between your horn and your horn button has come lose somewhere. I would remove the horn fuse until you can find the problem.
Check fuse for horn and for dash lights. If the interior lights work then suspect dimmer switch for the dash lights. If you press the horn button do you hear a click under the hood or inside the car? If you do not then the fuse is blown and if the fuse is good then the relay may be suspected bad. If the fuse is good and the relay clicks then suspect the horn to be bad. If fuse is blown and you put a new one in and you push the horn and the fuse blows again, then disconnect the horn before replacing the fuse again. Then push the horn button and see if you hear the relay click if you hear a click the the horn is bad or wiring butmost likely the horn. If you have the horn unplugged and the fuse is good and you push thee horn button and no relay click suspect the horn button to be bad. Hope this helps.
Probably the switch in the steering wheel, or fuse, but usually horn fuse works other things too such as cig lighter or radio. If everything else is working fine, then to troubleshoot you'll need a testlight. I would start with the wiring harness where the steering collumn plugs in and decipher which wire is the horn wire. Put the test light clip on +power, then check the wires on the collumn side one by one, pushing the horn button on each one. The horn switch is the wire that makes the light blink when you push the button. If you try all the wires and none make the light blink, then its probably a problem with the horn switch in the s. wheel. Does it have an after market steering wheel? Because aftermarket wheels often have crappy horn switches in them. Also could be a horn relay if it has one. If you listen carfully while pushing the horn, you should hear the relay faint clicking. If you hear this, then the switch is working, but the relay might not be. Follow the sound to find it if you hear it. Test all sides of the relay with your light. Should get power constant on one term, and the other two should light when the horn button is pushed. Hope this helps. Cheers.
The horn button itself is the switch therse power to the horn button and you push the button to complete the cicuit to the horn.if the horn is bolted to the body it is already earthed and requires power to work not earth.