This is pressure switch screws in bottom of the condenser. Does anyone know if this switch can be replaced without evacuation of freon? Thanks

 

Because the pressure switches are exposed to system pressure all the time,the refrigerant needs to be collected/ allowed to go out.
Evac and recharge will be required

Removal of a pressure switch without lowering refrigerant charge can be hazardous due to pressures like 80 psi minimum. That switch can shoot like a bullet

Can we ask how it was determined the pressure sw was defective ?

 

Can anyone provide me with a wiring diagram for the this A/C pressure switch along with horn and possible fog lamp wires. Those seem to be the wires that were damaged during wreck. I dont think I currently have correct wires going to the A/C pressure switch.
I purchased a new pigtail and the wires are black/Blue and Brown.

 

Until someone provides a diagram, keep in mind the low pressure sw will open if pressure gets below a certain pressure when compressor is running,and the high press sw will open if pressure gets above a certain pressure.. As long as system pressure is approx. 70 psi compressor not running, the switches should both be closed to allow the compressor clutch to energize and try compressing the refrigerant gas.
Power usually comes from the dash switch requesting A/C, goes thru both switches which are closed, on to compressor clutch.
If your system has enough pressure,you can verify power to and out of each sw to clutch.
Black wires, most times are usually ground connection. With a test light or voltmeter you can easily check .