On a recent return trip from Branson I was contacted by a trucker that all of my clearance lights and tail lights were off. I did have head lights and front clearance lights but was concerned about the back lights. Come to find out that a huge fuse was blown in the Ford drivetrain that protects the headlights and front clearance from a dead short in the coach. Problem was that there were no lights on the back. A trucker came up with the idea of turning the parking lights of the Toad to get back home..worked beautifully. Any ideas on what may cause such a monumental dead short in the system???