I had this same problem when my hot wire from my WH shorted to ground when I turn on the switch. After many hrs of trying to trace the wire and grab it to rewire I gave up. First it went in back of the exhaust vent hood, then in back of the refer not only not being able to see even with the grabber tool which I carry in the MH the wire was within a bundle and wire tied, no way to remove wire from the bundle. I finally just ran a new wire from my DC panel under the MH and installed a new switch in the bedroom and all was well again.
