Compatibility: 2004-2009 Dodge Ram 2500 2004-2009 Dodge Ram 3500 2008-2009 Dodge Ram 4500 2008-2009 Dodge Ram 5500 For more details,pls check compatibility Chart. what is a Cooling Fan? The cooling fan is a vital part of a car’s cooling system, which is located in front of the car radiator and sucks cooling air through the car radiator. A cooling fan in a car is activated by the thermostat in the car’s cooling system, or by an electronic system that senses when the coolant is too hot and switched on the fan through an electrical relay switch.It tends to be dormant unless the car is stationary or the temperature is excessively hot. .
