Re: Horn does not work and have switched the fuses and it...
Dealership told me the horn opening faces upward and eventually collects water that rusts or shorts out the horn. I bought two (higher and lower sound) horns and am in process of replacing them.
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Find a facility with a scan tool that can access the Body Control Module. They will need to look at the data. Ideally the scan tool will have bi-directional control. You should be able to watch the horn be pressed via the scan tool in the Body Control Module. If you can see it is pressed, but no horn sound, try to operate the horn via the scan tool. GM supports this functionality test. If the horn does not operate, check the horn relay. It could be a broken wire between the BCM and the fuse box, or between the horn contact switch and the BCM.
Under the hood you will find the fuse. There is also a reset button sometimes in the trunk under right panel or sometimes right out in the open. There is also a relay switch that goes bad on these too. Under the hood i think near the left side toward the fire wall there are three one for the horn one for the fuel and one for ac
The 3rd brake light working does reveal that the fuse is good, and the brake switch is good. Check the bulbs, sockets, and the wiring between the brake lights
find what fuse is, You have to follow the wires with patience, from the fuse box to the item, you have a short circuit look if the horn + wire is not touching metal outside or inside the steering column, have You replaced the steering wheel? if the same fuse covers the dome light, take it a part and see if the + wire is touching the inside of the roof, plastic melted, or look at the on and off Dome switches at both doors, look for the positive wire on radio, antenna and main light switch, yo can disconnect every item and check any time hot wiring that fuse with copper wire every time, to You are sure
Horn does not work. Have checked fuses and they are o.k.
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