Anything over about 15-20 m.a.is too much. A bulb on is about 250-300. Popular bad spots on those Dakotas were the harness by washer fluid jug(spilled fluid corrosive to wires,voltage cross tracking) and under floor matting/carpet. Also make sure trailer light plug-in is clean and dry. Thats where checking with a DVOM can help, as 100 ma draw can indicate a pregnant wire type situation.