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    1. #1
      Join Date
      Aug 2007
      Location
      Albemarle, NC
      Posts
      1,171
      Country Flag: United States

      3.4 swap using 7727 ecm wiring questions

      I'm doing a 7727 ecm swap to my 3.4 camaro motor powered S10. its up and running save for a few exceptions. cooling fans and AC system.
      are the pins for the fan relays coming from the ECM power or ground?
      also, pin C21 is labeled as the AC pressure signal.
      pin c17 is AC request
      pin a12 is ac control
      my origonal TBI motor in my s10 only had two connections to the ECM for the AC system.
      pin B8, labeled AC signal
      pin A2, ac relay control.
      what goes to what?
      also, can someone tell me what the pinout for stock fuel pump and AC relays from an S10 are? I've got terminals A,B,C, and D.
      thanks
      Michael

      Michael Crawford

      1970 plymouth Duster back under construction:
      https://www.pro-touring.com/showthre...uring-makeover

      1987 GMC S15 https://www.pro-touring.com/showthre...ct-drivabeater



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