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c104 wiring question e to i

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    c104 wiring question e to i

    Ok so how do you wire up the black wire from the c104 near the glovebox to the tach? I have an 84 eta and have found that the 87i harness I've used has the tach information in the blue/black wire on the 3pin c104 connector.

    Question is....where do I run that blue/black wire to? I sold my obc harness with the green and yellow connectors which run into the back of the cluster....so do i need that harness back or is there a place i can connect the black wire to.

    Also just run the green wire to something positive right?

    #2
    Read the ETM. The black wire is most likely your tach wire, needs to run to the engine harness.
    Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



    OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

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      #3
      Well I found some ETMs here... http://wedophones.com/BMWManualsLead.htm

      Traced everything back from the c103 connector and found the other end of the c104 stuck under a bunch of crap. The interior of the car has become storage for boxes and parts so I guess I overlooked it.

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