Help! I have a 1978 k 30 I just bought. Everything worked fine and we pulled it into the shop to check fluids. Accidently bumped the horn, heard a pop like a fuse blew and now there is no power at the key or headlights or anything. Replaced the fusible link coming off of the starter and also the one on the junction block on the fire wall. All the fuses in the fuse block seem to be fine. We're sitting here scratching our heads trying to figure out where to go next. Help!