2010 J1939 Connection All LHD Models The J1939 Datalink ABS TRANS ENG ICU 120 Ohm Terminating 120 Ohm Terminating Resistor Resistor Cab resistor located in dash 10” back from frontwall engine connection RXM DIAG Backbone Branch Circuit WST J1939 System Connections J1939 Connections Tying into the J1939 backbone is accomplished by tapping into the system using the terminating resistor tee’s located at each end of the backbone Front Wall Engine connection 40 pin 48/49/6900 76 pin 4700 The Chassis terminating resistor is located in a tee along the left frame rail, usually behind the cab.
The cab terminating resistor is located in the dash tapped 10” back from the Front Wall engine plug harness under the dash (shown on the left). The correct datlink resistence measured at any device, or at the diagnostic plug should be 60 ohmes with the battery disconnected. Resistor Receptor Part FTL# 23-13303-902 Deutsch # DTM04 - 2P - EP10 IMPORTANT: - It is essential that both terminating resistors remain connected to the ends of the J1939 backbone to dampen feedback signals. Numerous J1939 problems can be attributed to terminated resistors are missing or disconnected. - If connections under dash become disconnected.
Connections should never be reconnected back together directly IE ABS with ABS as this creates an independent circuit in the system that is not connected to the backbone. J1939 Connections for Body Builders To connect easily to J1939 at dash location order the following parts: (1) Tee and Jumper FTL# A06-37868-000 (1) Jumper Plug # DUFDTM06 2S E004 (2) Female Pins DUFWM2SB Page 1A-10 Rev (2.3) - Feb 2015