Dakota Quad Cab 2WD V8-4.7L VIN N (2001)
Radiator Cooling Fan Motor Relay: Description and Operation
DESCRIPTION
The radiator cooling fan relay is a 5-pin, solenoid type, mini-relay. It is located in the Power Distribution Center (PDC). Refer to label on PDC cover
for relay location.
OPERATION
The electric radiator cooling fan is controlled by the Powertrain Control Module (PCM) through the radiator cooling fan relay. The PCM will activate
the relay after receiving inputs from the engine coolant temperature sensor and/or an air conditioning on/off signal. Not Equipped With A/C: The relay
is energized when coolant temperature is above approximately 103°C (217°F). It will then de-energize when coolant temperature drops to
approximately 98°C (208°F). Equipped With A/C: In addition to using coolant temperatures to control cooling fan operation, the cooling fan will also
be engaged when the air conditioning system has been activated.
