You may have a short circuit in your horn button causing the
fuse to blow when you press the button or in the horn itself.
1. Locate the horn under the hood normally in the front of
the engine compartment.
2. Once you locate the horn, disconnect the wire from the
horn.
3. connect a VOM (Volt Ohm meter) to the horn's wire.
plus(+) side to the wire and negative (-) side to ground
or some metal part on the car.
4, set the VOM to dc voltage and have someone press the
horn button. You should read 12 volts on the VOM, if
not you have a short in the horn button, if you do mread 12 volts
you have a short in the horn. Replace the horn....
Replace the horn itself it has an internal short.....check by using a hot wire from the battery direct to the horn....
SOURCE: Horn will not work on Buick Skylark 1998
the horn relay is located under hood in the fuse box
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