It's getting warm here is California and I decided to excercise the A/C to make sure everything is in working order. When turning the switch to a/c and a/c max the air doesn't cool at all. I opened the hood and noticed that the a/c clutch doesn't activate. I took that plug off on the front of the compressor just behind the pully, put a test light on it and I'm getting no juice at all. I've checked all the fuses and everything is ok there. Any other ideas? Am I checking the wrong plug? Could it be something else? It worked great last summer.

I want to avoid taking it in if I can.

Thanks

 

Check the refrigerant pressure.

Modern compressors have a low pressure cut-off. If you're low, it won't go.