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Replaced m20 main engine harness....couple questions

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    Replaced m20 main engine harness....couple questions

    It always happens, you think you'll remember where everything goes and then something causes you to doubt yourself, so here I am with a couple questions:

    1) Where the harness goes into the firewall to the ECU....is there an easy way to get the plug through the firewall to make the seal? I know in the glovebox area, there are, what I'm guessing, finger pulls to yank the plug through....they just seem really flimsy and I don't want to mess it up...WD40 and pull???

    2) Again, where the harness goes into the firewall...I don't have a batter there, but I have the + terminal. I have accounted for all of the connections off the wiring harness except one. I'm not sure if it is a ground or connects to the terminal with the other wires. I'm almost positive I connect it to the terminal, but obviously, if I'm wrong this would be bad!

    3) What is the correct routing of the oil pressure cable/plug? I think the one I pulled was around the water pump, but it didn't seem correct. Everything else went fine

    4) The set of 3 x Relays.....I know the white is the main relay, can't remember what the other one is, and I have one blank spot. So, I just need to know what grouping of colored wires goes to which relay. I'm sure all the red/power wires is for the Main Relay, but then I have a grouping of green wires and another combination of colored wires. I believe the one with green wires is the one that I had blank
    1997 Artic Silver M3
    CES GT4094r 651hp/615tq @ 24 psi

    #2
    Front white relay is the main, second relay is fuel pump, and third is O2 if i'm not mistaken (might be ABS, can't remember)
    1989 JDM-Tech 2
    2010 335 D for daily

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      #3
      Originally posted by Simple_Smith View Post
      Front white relay is the main, second relay is fuel pump, and third is O2 if i'm not mistaken (might be ABS, can't remember)
      Yes, but which slot do they each go in? I'm looking to match the wiring with the correct relay since order can be changed
      1997 Artic Silver M3
      CES GT4094r 651hp/615tq @ 24 psi

      Comment

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