Radiator Cooling Fan Motor Relay: Description and Operation

DESCRIPTION
The electric radiator cooling fan relay is located in the Power Distribution Center (PDC).

OPERATION
An electric radiator cooling fan is used with certain models engines. It is controlled by the Powertrain Control Module (PCM) through the radiator fan relay. Not Equipped With A/C: The relay is energized when coolant temperature is above 103°C (217°F). It will then de-energize when coolant temperature drops to 98°C (208°F). Equipped With A/C: In addition to using coolant temperatures to control cooling fan operation, a two-gang A/C high-pressure switch is also used to control cooling fan operation. When equipped with this high-pressure switch, the cooling fan will not operate each time the A/C clutch is engaged.