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  1. 05-15-2014 #1
    800xcr
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    MEFI 3 Question

    I have the upper half of a marine harness and a Mefi 3 ecm that I am trying to work with, but having issues. If I power the red connector to the battery and the grounds to the ground of the battery, shouldn't I be able to see the ecm, or do I need the lower half of the marine harness? The half I have goes to the injectors, ecm and solenoids.

    Thanks
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  2. 05-15-2014 #2
    roughneck427
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    See it?? as in hook a scanner up to it or try and flash it?
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  3. 05-15-2014 #3
    800xcr
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    Quote Originally Posted by roughneck427 View Post
    See it?? as in hook a scanner up to it or try and flash it?
    Can't do either
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  4. 05-15-2014 #4
    roughneck427
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    What cable are you using? Look in the other mefi thread one of the guys posted the read and write wire pin out is there
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  5. 05-15-2014 #5
    800xcr
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    Quote Originally Posted by roughneck427 View Post
    What cable are you using? Look in the other mefi thread one of the guys posted the read and write wire pin out is there
    AKM cable and I get power at J2, pin 1. That is why I thought that I should be able to get something from the ECM.
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  6. 05-15-2014 #6
    roughneck427
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    well I used datamaster mefi 3 just fine with my LT1 cable all I needed was ground and serial going to my aldl cable
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