bench harness for ls2 and e38

[minytrker]

I have my bench harness for 99+ls1's that I made off the diagram on here and been using for a good while with great results. I finally got ahold of some wiring harness's and pcm's for ls2's and even a e38. How do i make bench harness's for those?

[GMPX]

E38
Black Connector:
Pin 19 = Switched Ignition Voltage
Pin 20 = Battery Voltage
Pin 27 = GMLAN -
Pin 28 = GMLAN +
Pin 73 (the big Tab) = Ground

E40
Blue Connector:
Pin 1 = GMLAN +
Pin 2 = GMLAN -
Pin 7 or 8 = Ground
Pin 19 = Switched Ignition Voltage
Pin 20 = Battery Voltage

Note: The E40 wired up like that will also be good for the P12 (IL4&5) PCM.

Cheers,
Ross

[minytrker]

How do you hook it all up to the ODBII plug?

[minytrker]

Im still lost, can anyone help on making a bench harness?

[Blacky]

The pinouts for the OBDII plug (the one on the vehicle) is shown in appendix B of the EFILive Scan Tool manual. Just match the signal descriptions that GMPX posted with the pins on the OBDII connector.

Note: GMLAN+ is CAN High on the OBDII connector, GMLAN- is CAN Low on the OBDII connector.

Regards
Paul

[minytrker]

Thanks alot, I got it now. I never knew that was even back there in the manual.