I JUST PURCHASED A BOAT AND WHEN THE PREVIOUS OWNER HOOKED UP BATTERIES ONE PAIR OF WIRES HE CONNECTED ARCED AND SMOKED. ONE WIRE WAS A BLACK 12GA THE OTHER WAS 16GA RED, HE HAD THESE WIRES CRIMPED TOGETHER. AFTER CONNECTING THESE HE CRANKED THE ENGINE BUT THIS CAUSED A WIRE WHICH LOOKS LIKE ITS GOING TO THE IGNITION CIRCUIT TO BURN. THE WIRE IS TAN WHERE IT ENTERS THE ENGINE CONNECTOR AND IS BLACK ON THE OTHER SIDE GOING INTO WHAT APPEARS TO BE THE IGNITION. ANY SUGGESTIONS ARE APPRECIATED.