Regarding the mice, you can purchase liquid tape. If you can get to the wires it's much easier than tape. Really check all of the wires closely for continuity, they could have easily chewed through. I have a Corvette that had mice and many chewed wires. I cut and spliced them all, we're talking twenty some wires, everything works now. Wiring back when your coach was made had vegetable based insulation, very tasty to rodents. The pucks are a good idea.
Just a suggestion, best of luck.