i have 2 OBD2 harnesses..

I have a 4 pin harness and need to hook it up to a 3 pin alternator..

I have a spare pulg which i am going to depin or solder..

all the wires match b.w 3 and 4 pin with an extra green/white wire on the 4 pin...

What is this green/white wire? do i need it..


The green/white wire is equaivalent to the white wire on the OBD1 motors..

What is it?


thanks peples