I'm installing a/c back in the car and for some reason the compressor wont come on... the fan will but the compressor wont. now i know it works cause i put direct power to it and it comes on. wiring diagram or any help would be appreciated.

 

Is there freon in the system? It won't kick on if there isn't any in there.

 

i know its leaking but there still should be some in there. ill check thanks.