Blowing clearance lights fuse

Hey guys, I have a 2003 379… where should I start looking? Every time I turn my wipers on it blows the fuse for clearance lights on the roof of tractor and trailer. I’m assuming it’s got to be touching somewhere around the wipers switch?

 

I'd check around the wiper arms. They are behind the dash

 

thanks man exactly what it was wire was jammed between the plastic harness and the arms so every time the arm would make the circle it would touch the bare wire and blow it.