help with c104 connector

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  • mikegar
    E30 Addict
    • Aug 2005
    • 523
    #1

    help with c104 connector

    im swapping from mototronics 1.0 to 1.3 and im having trouble figuring out what to do with the c104 connector. any help would be appreciated.
    Originally posted by Ferdinand
    I carry a cheap pressure gauge in my glovebox with which to manually check my tire pressures, but I keep forgetting that in the USA glovebox space is sacred as it is reserved exclusively for the purpose of storing handguns.

    DIVING BOARD DIVISION DIVISION IDIOT
    Tags: None
    • mikegar
      E30 Addict
      • Aug 2005
      • 523
      #2
      nvm searched a little more found my own answer.
      yellow purple wire connect to pin 8 on c101
      green wire connect directly to the positive terminal on the coil
      black wire connect to pin 9 on the c101
      Originally posted by Ferdinand
      I carry a cheap pressure gauge in my glovebox with which to manually check my tire pressures, but I keep forgetting that in the USA glovebox space is sacred as it is reserved exclusively for the purpose of storing handguns.

      DIVING BOARD DIVISION DIVISION IDIOT

        Comment

        • jlevie
          R3V OG
          • Nov 2006
          • 13530
          #3
          What to do about C104 is totally determined by what car you have. If the car has a C104 (up to 8/87) and you are swapping in a later engine harness that lacks C104, you need to modify the harness to add a C104 connector. If you have a late car that lacks C104 you need to use a late engine harness.

          Do not connect the tach signal to the coil. The tach signal from the DME is a 0-5 square wave and the higher voltage from the coil may fry the tach.
          The car makes it possible, but the driver makes it happen.
          Jim Levie, Huntsville, AL

            Comment

            • mikegar
              E30 Addict
              • Aug 2005
              • 523
              #4
              i have an 87 with the c104. so dont connect the green/tach wire(body side) to the coil. on the later harness(89 i believe) will the green wire from the 3 wire harness be the tach signal i need?
              Originally posted by Ferdinand
              I carry a cheap pressure gauge in my glovebox with which to manually check my tire pressures, but I keep forgetting that in the USA glovebox space is sacred as it is reserved exclusively for the purpose of storing handguns.

              DIVING BOARD DIVISION DIVISION IDIOT

                Comment

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