I purchased a 1990 Procraft Stalker C170 bass boat about a month ago. The boat is in good shape overall. I have replaced all three batteries (one marine, and two deep cells). The problem is that except for the trolling motor, I still can't get any of the other electrical components to work: fish finder, bilge pumps, live wells, running lights, etc. I wanted to know if there is a something simple that I am missing; perhaps a fuse or something.