Getting ready for a long trip and was checking the trailer lights when I noticed I don't have any taillights or dash lights. Replaced the fuse and unplugged the trailer and it tried it again and fuse blew immediately, so it's not the trailer. Yesterday I was working on CB and cleaned the connections with contact cleaner to the connections under the seat (because I keep getting a "CB error". Don't know if that is coincidence or not. What should I be looking for?