Radiator Cooling Fan Motor: Description and Operation

Fig.9 Power Distribution Center (PDC):

Vehicles equipped with a 2.6L/4.0L engine and air conditioning and 4.0L vehicles equipped with the "max" cooling package also have an electrical cooling fan. The fan is controlled by the cooling fan relay, which is located in the power distribution center (PDC). For the location of relay within the PDC, refer to the label on PDC cover.
The electric fan on the 2.5L equipped vehicles is considered the primary fan (low to moderate ambient conditions) and is energized when the JTEC receives input from the coolant temperature sensor or the a/c system and supplies a ground to the cooling fan relay.
When coolant temperature reaches approximately 103° C (218° F), or when air conditioning is requested, the powertrain control module (PCM) provides a ground path for the fan relay. This ground is provided to the cooling fan relay through pin C2 of PCM connector C3. Battery voltage is then applied to the fan through the relay. When coolant temperature drops below approximately 98° C (209° F), the PCM opens the ground path to the relay. This will prevent the cooling fan from being energized.
The cooling fan motor is protected by a 40 amp maxi-fuse located in the PDC. The fan relay is protected by a 15 amp fuse located in the junction block.