2003 town and country not getting power to a/c compressor
 

2003 t&c 3.8l with rear a/c
I just pulled a vacuum on the system, it took 3-12 oz cans of freon.
the compressor was not coming on, checked the relay and fuse were good
pulled the wire plug at the compressor and can not get power at the plug, while turning on the a/c on and off from the control panel.(blue wire is hot wire)
When turning the a/c on;/off when turned on the engine idle would increase (to me this means the control is working?)
when checking the relay contacts at the fuse box under the hood, I could not find a ground at any pin?? this does not seem correct......
would like to find wiring diagram that shows the circuit from control panel ,to fuse box (relay)and fuse, to compressor.....
would like to know what the contacts at the relay should read.
thanks

buy a service manual it will have a wire diagram for you