Battery terminal wiring

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  • London
    E30 Addict
    • Aug 2010
    • 532

    #1

    Battery terminal wiring

    Hey guys I'm finishing swapping a m20b25 out of a 91 into a 86 ES chassis. At the positive battery terminal what should be going where? Sorry the pic is flipped but when I say top I mean the post to the left with the black wire coming off it

    In the picture there is a top post with a thin black wire running from it I know that is the correct position but a second should go there as well. The wire in my hand is coming from the b25 harness and is red. The other two to one red one black come from the fuse box.

    Should that black fuse wire link to the top post and the red to the right side with the wire from the harness?
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  • barry
    E30 Mastermind
    • May 2009
    • 1642

    #2
    I have the same problem?

    Comment

    • London
      E30 Addict
      • Aug 2010
      • 532

      #3
      Still can't figure this out, could someone more experienced chime in. It's holding me up big time.

      Comment

      • ForcedFirebird
        R3V OG
        • Feb 2007
        • 8300

        #4
        john@m20guru.com
        Links:
        Transaction feedback: Here, here and here. Thanks :D

        Comment

        • London
          E30 Addict
          • Aug 2010
          • 532

          #5
          Originally posted by ForcedFirebird
          Yes I have been referencing this and it says nothing about that battery positive cable or the proper setup of the fuse wires. Nor can I find a picture online that is of any use

          Comment

          • efficient
            No R3VLimiter
            • Feb 2012
            • 3312

            #6
            I had this problem when I did my swap. I'll go take a look right now

            Comment

            • efficient
              No R3VLimiter
              • Feb 2012
              • 3312

              #7

              One of the thick wires that comes off the harness goes on the side of the battery junction.

              Comment

              • efficient
                No R3VLimiter
                • Feb 2012
                • 3312

                #8
                the ones with the red insulation go in front of the junction that wire comes from the fuse box

                Comment

                • ForcedFirebird
                  R3V OG
                  • Feb 2007
                  • 8300

                  #9
                  It is laid out in the link.

                  Either way, it's the small fusible link wire that comes from battery goes to the small wire by itself (ECU isolated power), the reds all go to the block, the browns go to ground
                  john@m20guru.com
                  Links:
                  Transaction feedback: Here, here and here. Thanks :D

                  Comment

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