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Thread: bench harness for ls2 and e38

  1. #1
    Lifetime Member minytrker's Avatar
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    Default bench harness for ls2 and e38

    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?

  2. #2
    Forum tyhee Site Admin GMPX's Avatar
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    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


  3. #3
    Lifetime Member minytrker's Avatar
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    How do you hook it all up to the ODBII plug?

  4. #4
    Lifetime Member minytrker's Avatar
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    Im still lost, can anyone help on making a bench harness?

  5. #5
    EFILive Developer Site Admin Blacky's Avatar
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    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
    Before asking for help, please read this.

  6. #6
    Lifetime Member minytrker's Avatar
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    Thanks alot, I got it now. I never knew that was even back there in the manual.

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