Quote:
Originally Posted by nsb29
I have duel fans controlled by the ecm and three relays both fans run on low speed or high depending on temperature for the a/c I have a binary switch and a high pressure transducer Which will allow the ECM to see the pressure of the AC system so that it can stage the cooling fans accordingly bump the idle and calculate load this is how all LS equipped vehicles operate in factory form
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Is your AC compressor factory LS style or Vintage Air Sanden? What year LS did you use, and do you recall if the ECM needed a ground or 12v on the pin that tells it that the AC is on? Some LS engines use 12v and some use ground. Mine is an 02 LQ9.