So you have a car that has all the A/C parts and hooked up but nothing else. I need the run-down of how you conclude what's the problem, what's it need? A step by step trouble shooting list.
May need to add A/C Black light dye.
Check for a Blown A/C power fuse.
Make sure the A/C Clutch engages.
Check for a Freon charge with A/C Guages connected.