About a year ago I ran into a tree head on at like 5 mph. (Long story). Ever since then when it rains the radiator fan spins and the horn goes off. The only way to get it to st is to disconnect the horn and everything is fine. I have replaced the horn and the radiator fan. Also have cleaned up and checked all the wiring. Is there something I'm missing? Its really annoying to have to disconnect my horn when it rains.

 

Wiring is shorting out, you gotta pull the harness apart