Wire Harness Device

A wire harness device for connecting a diagnostic computer to a variety of engine control modules includes a ribbon cable. A power connection port is electrically coupled to the ribbon cable. A service tool connection port is electrically coupled to the ribbon cable to connect a diagnostic computer. A plurality of adaptor plugs is electrically couplable to the ribbon cable. Each adaptor plug includes an associated engine control module plug to connect an associated engine control module and to facilitate communication between the engine control module and the diagnostic computer. An adaptor port is electrically coupled to the ribbon cable to receive the adaptor plug. A pair of terminating resistor plugs is electrically couplable to the ribbon cable to absorb a voltage travelling through the ribbon cable. A pair of terminating resistor ports is electrically coupled to the ribbon cable to receive the pair of terminating resistor plugs.