I was out with my grand kids and dropped anchor to eat some snacks. After an hour or so I attempted to start the engine but found the 15 amp fuse had blow. I replaced it 7 times until I ran out of fuses, then rigged the fuse with foil to get us home. I know it's got to be a short but I have failed to find it after hours of looking. I can't find any sign on the purple wire or others that show a melted or bare wire. Help....