My old boat had a fuse board with the long, cylinder-like fuses. My new boat has little white buttons that say to push them in to reset the fuse. I think one of the fuses may be blown, but I can't pull the button out. I assumed that the "button" was the end of the fuse, but now I'm not so sure. I looked behind the dash, and it appears the "button" is part of a small, black box that the +/- wires attach to. Is this small black box the fuse and if so, I would imagine that to change a fuse, I would have to replace the entire black box?