My pointer is almost 3/4 up the wedge scale. What you are saying is it should be adjusted all the way to the end of the scale, correct? I don't know if there is enough freon. I have no way to check. The front plate on the compressor engages when the AC is turned on inside the car. With the AC off the front plate is not turning but when the AC is turned the plate is engaged and turns. There are bubbles in the sight glass. Is this good or bad? Is the low pressure switch the red plastic cylinder that is attached to the dryer near the sight glass? The wires for the aux fans are from a connection that is mounted in a line just next to the drier? With the car running and the AC off, I want to touch the two wires from the red low pressure switch together and see if the compressor engages, correct? No, it has not been converted. The AC was working well until I changed the water pump. Since then, it had worked on and off until now when it is not working at all as far as blowing cold. The fan works just no cold air. I was told there was not enough tension on the belt that is why the AC is not working. Where is the AC relay located and how can it be checked? Thanks in advance.