ok guys so heres the story went to firestone to get my 94 gt's ac fixed. They tell me the compressor is bad, the clutch is locked up. I change out the compressor. then they tell me the compressor must be bad something about getting power to it but no ground. So i exchange for another compressor completely different brand and take it back in. they tell me the system is good, holds a charge no leaks but they cant get the ac clutch to kick on. They do some wire chasing and find that the constant control relay is bad, great, so I go and buy one and put it in and the clutch doesn't kick on at all. Help me out what to do now?