A/C!

Ok like I mentioned in the previous post my a/c doesnt get cold anymore and it was due to the compressor ( I think ) not gettin any power from the A/c unit. I replaced the whole A/C unit and again not as cool. Took it to a repair shop and they told me its not getting power. So again and to replace the unit ( I think it wasnt compatible wit my car ), so I replaced the unit again with the right one and im still having the same problem what can be causin it not to get any power? Can it be the a/c harness? Please hlep if u have any questions just ask