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A/C pump not working

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by eshorvath, Jul 9, 2002.

  1. eshorvath

    eshorvath 1/2 ton status

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    Location:
    Southern Oregon
    My AC is not charged. When I turn on the AC, the pump does not engage. Is there a switch that prevents the AC pump from engaging when the coolant is low or empty??
    Edward
     
  2. porkchop

    porkchop Registered Member

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    Location:
    NH,seacoast
    That topic was just talked about look on page three (3)
    It will be under 7/5 something like A/C wires That should give you all the help you need
    Good luck
     
  3. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Sioux City, IA, USA
    Yeah, take a look at your dryer. Its that big metal cylinder over on the passenger side of the firewall. There's a switch in there that only closes when the system has pressure because it is fully charged. Take your hand and try to move the center of the pulley of the compressor, it should budge some. With the compressor clutch disengaged, only the outer part of the pulley will move. With it engaged the center begins to move and works the compressor.
     

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