Cooling System: Description and Operation

Electric fan system consists of a fan and electric motor. This system uses
a coolant temperature switch, mounted in thermostat housing, to sense coolant temperature, and a cooling fan controller. The fan is wired to operate only when ignition switch is in RUN position.

On vehicles equipped with A/C, cooling fan motor will be energized whenever A/C cycling pressure switch closes, with select lever in A/C or DEFROST position. The A/C clutch coil will be energized once voltage is supplied to fan motor. The fan motor will stay energized as clutch cycles, if cycling pressure switch open intervals are less than 2-3 minutes. If coolant temperature switch closes in A/C mode at approximately 210°F, fan motor will run until coolant temperature
drops below approximately 193°F.