ac on my 93 ford

Can you confirm that the compressor doesn't turn on at all? You'll need to check for system pressures to see if the refrigerant is low. There could be a system electrical issue as well....such as a faulty compressor coil or cycle switch failure.

If it's low on refrigerant, some won't kick on, could also be ac clutch or switch and check fuse, should be a 30 amp.