Radiator Cooling Fan Motor: Description and Operation

Fig. 1 Electric Cooling Fan Module:

Fig. 2 Electric Cooling Fan Module:

Fig. 3 Electric Cooling Fan Module:

ELECTRIC COOLING FANS, DESCRIPTION
The electric cooling fan, is controlled by a fan switch which is located on the radiator or engine, or is activated by an on-board computer. The switch on the radiator will engage the fan when coolant temperature reaches 200°F. The on-board computer uses two thermistor sensors, one of which is for the cooling system fan, to detect coolant temperature.