Hi guys Im new to this boating thing and have searched around and havent really found the answer im looking for. So here goes, I just bought a 16 ft riveria, tach doesnt work, speedo doesnt work..ect I just want to rip out all the wiring and gauges and replace it with new. I know you need a fuse box and bus bar. The qusestion is what wires go to what? a main neg and pos from the battery to the fuse box, and then all the little wires to that? Im way confused. Do you need both a neg and pos bus bar? I wish there was a diagram somewhere with detailed pics. Thanks -Brian