1999 5.7L A/C compressor Not Turning on

[J_Swaleh]

Hey,
I have replaced the fuse and the a/c relay and the compressor still isnt turning on when i hit the switch. I tested the wires at the compressor, and they have no power. I am lost!

[aztecf]

I assume you tried jumpering the low pressure switch?

Jeff

[laxman21]

Low on R134a?


Was the relay bad?

[jwinlund]

I have exactly the same problem on my 1999 GMC Suburban 5.7.
I swapped the relay and inspected the fuses also.

When you find out what it is, please let me know.

Jim

[brown1911]

Try tapping on the front of the compressor with it running. Your clutch is probably stuck. I found it out of frustration on a 95 1500 pickup I was working on. Be careful and not get into fan.