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Q: horn relay removed, horn will still honk on its own on 1999 Ford F-250 Super Duty

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while the truck is running or not, the horn will randomly honk. A couple short honks or just stay on. I've removed the horn relay, which I would think would eliminate any functions of the horn. I'm wrong. What's causing this?
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Somewhere between the horn relay and the horns there must be an intermittent short to power. trace back from the horns to the relay and look for damaged wiring.
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