Discovery electrical problem

I had this problem, my clearance lights and tail light would not come, dash, head, turn and stop would work. check fuse and the clearance light fuse was blown, put a new fuse and it blew, so ( be careful doing this ) I put in a larger fuse and crawl under the MH and trace wiring, found that the wires to the tail light was getting hot, pull the fuse and I saw doing this that one of my clearance light was out, so I change out the light and every thing work ok. What had happen the bulb did burn out but it had shorted it self out inside, a direct short. never heard or had the dealer every heard of this. That MHing, you never know what next.