A/C compressor not turning on?

I’m trying to get my A/C working. The problem I’m having is the compressor is not coming on. I can jump 87 and 30 on A/C relay and compressor comes on. I've tested low pressure switch with the switch unplugged. I have ground on black wire and on blue wire I have 4.57 volts. I plug in connector on low pressure switch and have ground on black wire and no ground on blue wire and blue wire still has 4.57 volts.

I have evacuated and charged system. I have 24 oz. in the system I know it needs 2 more oz., but in my pass experience the compressor should have come on after 2 cans of Freon.

I’ve changed low pressure switch but still the same result.

I’ve checked the green, white wire from pin 43 and I have no ground there.

I’ve changed PCM over this and it’s still doing same thing.

It takes a couple of pushes to get the button on control panel to come on its manual control. Could a faulty control panel cause this?

What should I check next?

Thanks