This Y adapter allows a standard J1939 interface to connect to a CAT industrial Diagnostic Connector and still allow an open CAT interface.

Wiring Connections

CAT Female	Signal	CAT Male	J1939 Male
A	Battery	A	B
B	Ground	B	A
C	CAT Shield	C	-
D	CAT Data Link +	D	-
E	CAT Data Link -	E	-
F	J1939-	F	D
G	J1939+	G	C
H	J1708-	H	G
J	J1708+	J	F

Don't see what you need? Check out our Custom Cables page or give us a call at 310-793-2410. We can custom make nearly any configuration to your specifications.