Help needed with rewiring problem
Hi All I am rewiring a twin engine boat. It is a 30 ft speed boat with twin Mercedes diesels. I have replaced all of the gauges and fitted a gps speedo. I am struggling to find the correct way to wire the fuel gauge and the speedo. I have separate ignition switches for each engine. The gauges (rev counter, oil, water and temperature) are also separate for each engine. Can anyone tell me the correct way to connect the speedo and the fuel gauge?