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How to test the radiator fan

Model: (Various brands) Various
Part: Blower motor

Video tutorial

If we have doubts about the radiator fan of our car being defective, we can follow this video, which will guide us through a simple system to test its functionality. We will need cables with faston connectors attached to the end, which we will attach to the fan's pins.

Disconnect the fan plug, and connect the cables to the pins, which can be two or three: in the video's case, there are only two. First on the positive and then on the negative, where it will discharge. If we reverse the polarity, the fan will rotate in the opposite direction, proving that the fan is still functioning perfectly.

If the fan had any issues, it would not have moved.


Posted on 16 April 2025 by ScegliAuto


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Watch the video!


by ScegliAuto

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