Understanding the J1939 Data Link Connector Wiring Diagram

J1939 Yellow Wire High Or Low Can. J193911 CANbus CABLE 2 CORE TWISTED & SCREENED PER METRE TE Red is Power - 12 V Black is Ground - 0 V Yellow is CAN High - 2.5 V Green is CAN Low - 2.5 V This Tech-tip will guide you through checking the resistance and voltage in the J1939 datalink

Splice the yellow CAN high J1939+ wire from the converter cable to the yellow CAN high J1939+ wire from the truck's J1939 bus Red wire: Power supply, +12V Black wire: Ground White (or Yellow) wire: CAN High Green wire: CAN Low From 'John Deere' : Link

Deutsch SAE J1939 CAN Yacht Automotive Cable_PremierCable

Two wires are for power regulation (CAN Power and CAN Ground), and two wires are for data transfer (CAN High & CAN Low) Red is Power - 12 V Black is Ground - 0 V Yellow is CAN High - 2.5 V Green is CAN Low - 2.5 V A short circuit can occur in the J1939 backbone or stubs between:

WhatisSAEJ1939. CAN / J1939 Manual Wiring 5 Wiring The CAN Bus The CAN bus consist of two wires Maximum theoretical cable length for the Whole CAN bus is 250 meters

J193911 CANbus CABLE 2 CORE TWISTED & SCREENED PER METRE TE. 4.The J1939 data link consists of a twisted pair of yellow and green wires that all the modules on the truck use to communicate with each other As a way to remember the difference between wires, CAN Low wire is green.