Mint condition, fully functional light to heavy-duty truck protocol adapter. Model 4 plus by Dearborn Group DG. Includes the e-manual (28 pages) and a 16 feet long USB cable to connect it to your PC. Device as 3 light indicators and is marked with protocols J1939 (CAN) / SW CAN, J1850 / Class II (J1850 VPW) and J1708 # UART. Device measures 3 X 5 5/8 inches. Serial 1A3G3-1106-10258, original barcode sticker on back. A cable will be required to connect the device to the vehicule (example a J1939 Split 6/9 pins Deutsch cable).

The Dearborn Protocol Adapter 4 plus (DPA4) is used to connect vechicle communiction networks and personal computers. Allows PC programs to retrieve vehicle fault codes, component info and perform vehicle and component level diagnostics.