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31242Re: Chevy AC questions - G30

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  • Phil
    Sep 2 3:51 PM
      I believe the relay you are hearing is the high fan speed switch, it is activated on high fan speed and is a direct link between battery + and blower motor thru a fuse or fuselink. the relay is under the hood usually near blower. The relay is energized by a + feed from fan switch, in lower speeds the relay is not energized and output of the fan switch/resistor coils goes thru relay to the blower motor. This is how it was done in many Chevy's with AC. Phil
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