Thanks Escort, even my chilton's thats 10 years old and was made when they actually explained step by step disassembles skipped over that one.

A post on the ranger forums indicated that the AC clutch goes hot when the switch is in those positions, so I guess that part is working good. I guess thats for dehumidification.

I got an inline radiator hose adapter to mount the temp sensor, hopefully that will solve the rapid fire switching of the thermostat.