Disconnect the connector to the ac clutch and put a meter on the side coming from the car (ac button) and see if you are getting voltage. What is the voltage if you are? The connector there is prone to corrosion and VERY hard to reach, so make sure your smallest hand friend is available to clean those contacts! (I am a girl and it was tight even for me.)
Remember that the computer will not allow the clutch to engage if it does not see adequate ac coolant pressure.
My next question is if you got the oil charge right. 6 OZ of oil I believe is factory spec. Unless the compressor came with the oil aready in it of course....
I checked for voltage on the side coming from the car. I got zero volts. I used 6oz Ester 100 oil which is compatible with R12 and R134. I now plan on looking for the pressure switches.