91 gmc serria a/c compressor won't come on

hello i checked for power going to the wire going to the a.c compressor and no power to the wire fuse for the fan has power any help would be grateful

Brian

If the pressure cycling switch (at the accumulator) is bad or you are really low on refrigerant, you won't see any power at the compressor.

Try jumpering the pressure cycling switch and then check for voltage at the compressor.

//2000CAYukon