Typically used on transmissions and crankcases

black wire = ground

off-road and racing machines operated under normal to extreme conditions

gear position and boost

dynatek dynatune 4 pin 7OM Typically used on transmissions andFor J1850 protocol models (4 pin diagnostic port). The DynaTune is an optional fuel monitoring module designed to be used with the Dynatek Fusion EFI and Dyna 2000 HDEFI. It includes two wide band O2 sensors for precision and accurate measuring and tuning on the fly. It will enable automatic correction while you ride. Each map that is offered has pre set AFR (Air Fuel Ratio) target values. Advanced users can change the AFR from the given baseline