I took my truck into the dealer to have the horn looked at due to it sticking on and they spent an hour looking for the problem. They say the fuse panel in the passenger side kick panel has shorted out. The tech said it was the horn relay that is built into the panel that shorted and that is why the horn wont shut off. The part alone is $250 and they estimate 3 hours labor. I am sure glad it is under warranty.

I was wondering if anyone else has had issues with the fuse panel???

 

That area is prone to water leaks. Is it possible that your fuse panel may have gotten wet?