The Ram 1500 Cooling Fan Assembly pulls air through the radiator when you're going so slow that enough air won't flow through on its own. The Cooling Fan Assembly utilizes a shrouded blade activated by a belt-driven clutch or integrated electric motor to pull airflow across the fins, allowing heated coolant to lose temperature before re-entry into the block. When it was first introduced in the Ram 1500, it made use of a mechanical fan that turned whenever the crankshaft did. While that was a simple enough construction with no moving parts, it wasted power at highway speeds. Later Ram 1500 models made use of an electric Cooling Fan Assembly that only spun when sensors detected the temperature was rising. In other words, it was not always on, so it saved fuel as well and noise was less annoying too. So today's 1500 setup is all about balancing better cooling with fuel economy. No matter the style, each Cooling Fan Assembly is located just behind the grille, next to the radiator. The assembly consists of a fan, motor, and molded shroud all in one bolt-on unit. The Cooling Fan Assembly keeps the Ram engine in the safe operating range during traffic jams, towing, or off-road idling.
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