Description: OBD2 16 pin female to J1939 9 Pin Adapter Cable. It has integrated the basic diagnostic functions of J1939 heavy duty truck standard communication protocols. 9 pin female connector can be found in a range of diesel-powered applications: vehicles, marine propulsion, power generation and industrial pum ping. Length: Approx. 30cm/11.8 Inch Specification: Pins Definition: Pin A: Ground Pin B: Power, 12V or 24V which depends on your trucks/vehicles output. Pin C: CAN1/J1939+ Pin D: CAN1/J1939- Pin E: CAN1/J1939 Shield Pin F: J1708/J1587 High Pin G: J1708/J1587 Low Pin H: Null Pin I: Null which is for Port J on trucks/vehicles'socket. Applications: J1939 CAN BUS diagnostic unit (for trucks); J1939 body builder CAN bus monitor (for trucks); J1939 interface industrial engine display unit; ISOBUS-control devices; CAN bus Universal Controller; CAN gateway and bus simulator; Truck diagnostic tool/equipment/scanner,code reader... Package Includes: 1 Piece OBD2 Adapter