2014fusionse

Hello, Thanks for taking the time to read and help! I have a 2014 Ford Fusion (1.5L) that AC is not working on. The fuse (#22 10-amp) and the relay (#33) are both good. I tested the fuse, and swapped the relay with the horn relay, and the horn works, so I know the relay is good. My brother-in-law used a power probe at the relay panel to engage the clutch, so I know it’s not a power connection. My suspicion is a pressure switch on the low-pressure side not sending signal to the relay. There is plenty of refrigerant in the system, perhaps too much, but I wanted to see if I could trigger the clutch. 1.) are there any other fuses or relays that I could check? 2.) the AC indicator on the instrument panel illuminates and stays on 3.) where do I find the pressure switch on the AC system? 4.) what else could it be? I read an article about an evap temp switch that involves ripping the dash apart, and I wanted to try the pressure switch first. Thank you for your time! BW