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Thread: Square to flat IAC plug

  1. #1
    Fuel Injected!
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    Square to flat IAC plug

    What’s the wiring difference between the square plug to the flat plug on the IAC. I have an adapter but I do think its wrong as it goes to fully retract when I start it....
    Also are all the flat style Iac motor the same on the 7.4 TBI???
    Thanks

  2. #2
    Fuel Injected! PJG1173's Avatar
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    Nov 2011
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    when switching to the flat from square two wires need to be transposed. I cant remember off the top of my head which ones.

    edit: looking at the diagrams I used for my 454 tbi upgrade, blue\white and blue\black are transposed
    Last edited by PJG1173; 03-07-2018 at 07:54 PM.
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