Temperature Control Switch

Wiring for the temperature control switch has 2 dark blue wires attaching to it. One wire goes from the AC/Heater vacuum switch to the temperature control switch and the other goes from the temperature control switch to low pressure switch/air compressor. There is also a light green wire from the AC/Heater vacuum switch to the fuse block. Does anybody know if both wires on the temperature control switch are energized all the time or is one energized all the time and the temperature control cable allows the other wire to power up? How does this work? Any help is appreciated. 1972 Plymouth Scamp, factory air.