On my 94 concorde the radiator fan does not come on when the ac turns on. It does turn on when the coolant switch is disconnected or the car gets warmed up. The ac compressor turns on and the ac will blow cold if going down the highway. From what I've been reading the high pressure switch is the likely culprit. Is there a way to test the switch and also can the switch be removed without draining the AC system? Thanks for the help.

Benji