B4 u tear it down, unplug the compressor and jump 12v to it with car running. one to battery pos. one to battery ground. It doesnt matter which is which. The compressor should start turning and blowing cold. What happens is the high/low pressure switch doesnt command the compressor on sometimes. I just dont want you to do all that work again,and still have the same problem. Trust me Ive done it myself, NOT FUN! So run a hot to the clutch Ill bet money it will turn.