No power from ac switch to ac compressor clutch

SOURCE: 1992 gmc c1500 ac compressor relay location

I pulled this from another web site
"The AC clutch relay is located inside the cab on a metal bracket that is easiest to see when you remove the glove box compartment.

The relay is on a metal bracket bolted to the top of the plastic air box, forward and to the center of the dash from glove box.

There are three relays in a row on that bracket. The AC clutch relay is the end one closest to the driver’s side."

Testimonial: "Right on target... THANKS"

SOURCE: 1999 Jeep Grand Cherokee AC high pressure switch tripping.

did you add freon to your system if so how much try letting some out.

SOURCE: ac compressor clutch relay 1991 honda accord

Difficult to describe, but I will give it a try.
Inside the driver's side fender, close to the front of the car, there is a bracket that is held in place by one bolt, but which has a short horizontal bar as part of it which has two large clips encircling two cylinderical devices which have wires clipped into them at the bottoms. The one closest to the front (radiator) is the compressor clutch relay. The other one is the condenser fan relay.
Hope this helps you find it.

SOURCE: ac compressor clutch does not engage

to prevent damage to the air conditioning system there is a "low pressure switch" located on the condenser near the low pressure hose (large one) .. if the refrigerrant (R134A) gets too low then the clutch will be blocked from activating by that switch .. you can have your system tested and recharged or you can do that yourself .. the R134A is available at auto parts stores .. some come with a gague that is required for proper charge .. if you dont already have a gage then yoiu will need that one ... recharge kits often come with instructions .. other less likely but possible problems could be a fuse or bad AC clutch relay. sometimes damaged wiring or bad clutch will be the problem but much more likely just low fluid ..

SOURCE: ac compressor clutch is not engaging

Dear Madam or Sir,

this concern is prpbably due to a lack of coolant. There is a pressure sensor monitoring the system pressure of the A/C system that will interrupt the activation of the A/C compressor to prevent it from being damaged.

If there is not enaugh coolant, the system pressure will drop below a fixed threshold level and the compressor protection circuit will activate.

So you should have the coolant level to be checked at the shop, if it´s OK, put an eye on the pressure switch itself :)