Trailer brake controller shows sort circuit
Hello, my first time doing a post and I am hoping someone has run in to this issue and figured out the fix.
Issue: I have a 14' box trailer that I have always towed with my truck which has a integrated brake controller(Chevrolet Duramax 2500hd) no problems with this setup. Recently purchased a 2004 Itasca Meridian, hooked up the trailer and everything is fine until I turn on the lights. It instantly blows the dash light fuse, but all the trailer lights still work fine, although the controller shows "sc" I assume this means short circuit.
I have pulled the trailer harness connector apart and everything looks good.