96 Silverado Z71 no AC

[OldGuy96]

I'm working through a series of electrical issues with this truck, none of which have (so far) been major. I'm hoping that someone can give me some guidance on the AC not working.

The blower runs on all three speeds, I can adjust the heat to warmer of cooler, and the floor, dash and defrost modes seem to work fine. The problem is that I don't have any lights on either the AC or Recirculation switches on the climate control module. I had lights at one time, but the compressor hasn't run since I've owned the truck.

I'm not educated on how the AC should work on this truck, what the power flow is to activate the compressor, or what the common problems with the AC are. Any help to troubleshoot this and get the AC working as it should would be much appreciated!

 

[east302]

I'm pretty sure that power to the compressor comes through the a/c dash control first.

How is the refrigerant level? Any leaks?

The low pressure switch (cycling switch) is on the accumulator. If the system is charged and not leaking, remove the harness and jumper it and see if the compressor kicks on.