Yes, what I am saying is the aux. fan only comes with 105* engine coolant temp. and never seems to operate as a function of the air conditioning. Sight glass is clear, radiator and condensor coils have been cleaned and the clutch cycles on the compressor. But the only time I get cold air is when the aux. fan cycles on if/when the engine ever reaches 105* engine temp.

I know I need to connect some guages to actually determine the refrigerant operation of the air conditioning but I get the feeling that I may have either an electrical problem or a failed pressure switch on the receiver dryer. From what I see on the schematic, I think I can jumper the press. switch plug and check the relay, fuse and wiring portions of the system. Since I would have to purchase or borrow some R12 guages, I would like to ensure the rest of the system seems to be in operating condition.

My question is, shouldn't the press. switch usually be activated and the aux fan on nearly all of the time when the air conditioning is on?

__________________
Sam

84 300SD 350K+ miles ( Blue Belle )