A/C clutch stays engaged

Ken, I installed a used Nissan pressure switch tonight, vacuumed and recharged and finally when I shut the AC switch off it actually turns off. I will be taking my brand new pressure switch back to O'Reillys and they better have some money waiting for me. Their faulty new switch has cost me a butt-load of time, refrigerant, parts chasing, a control panel and on and on and on. Thanks for making me stay in the fight until I sorted this out. I was ready to go old school, but what bothered me was the IACV was activated all the time due to the ECU getting the signal for AC. I bet vital parts of my anatomy the new switch is wired wrong. Good lesson for anyone reading this in the future is never completely rule out brand new parts and always return to the scene of the crime. I like to say look at the last thing you messed with. Best wishes man and thanks again!

I bought this truck not to long ago and noticed the air conditioner did not work. So I checked the high pressure and it was extremely too high so I let the pressure out to where it should be. After that I noticed the clutch still did not engage, so I direct wired the compressor to the battery and the clutch engaged. I proceeded to buy a new air conditioner relay and the clutch still did not engage?

It was between 120-150 psi.

No, it has never worked. I have only owned the truck for a week.

How do you test it? I have taken the connector off and put my test light in it and it does not light up, but it changes the rpm's?

Also the pressure last night was 35 psi.

Also, when I turn the truck on and I put it on max air conditioner it changes the rpm's, but the clutch is not engaged.

I will try that in the morning. What psi should I be at? Air conditioner's are not my specalty. Lol

So, I put my volt meter on it and it is getting power, when I re-hooked the connector back up to the pressure switch the rpm's went up then back down.

How do I test continuity?

Sorry stupid auto correct how do I test continuity?