Pin-Out for 3 pin tractor type auxiliary plugs and sockets, also know as COBO or DIN-9680 Pin 15/30 is permanent +12v, Pin 31 is Ground, Pin 82 is +12v when engine running
Pin 15/30 is permanent +12v, Pin 31 is Ground, Pin 82 is +12v when engine running
"Sixty on Thirds" Change Bell Ringing Chart