BMW PWM electric fan bench testing, easy method

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This is the easy method I use to bench test BMW electric radiator fan. Works with pretty much any electric radiator/aux 12v fan that uses a PWM signal to control it. You just need a cheap PWM signal generator from eBay or Amazon, a decent 12v power source like a battery or a jump box, and some wires or test leads.

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Опубликовано:

30 сен 2023

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Комментарии : 9

@mckinleyhodges4845 10 дней назад

Thank you! Couldn't figure out how to test my fan before replacing. New item for the toolbox.

@rigmaster1 10 дней назад

Glad it helped! I could not find any good way to bench test this type of fan, so I decided to put my Rigmaster skills to work.

@aushende 2 месяца назад

Coming from e46 owners group I’m the guy that’s having that dme issue no other codes but I wanted to come to this video seeing as I already have this installed by previous owner and if I ever have issues I’ll know of top how to do it can’t wait to learn brother ☝🏻

@khefer1980 Месяц назад

Hey. I got E87 (series 1) with N46B20B engine. My fan is working on very low RPM and it is not dependent on temperature or air conditioning. Sometimes it won't turn on at all. After connecting INPA and controlling it, it starts at maximum speed without a problem. Is it a problem with DME that it doesn't control this fan? It seems to me that after turning on the air conditioning, even though it only cools the condenser, it should spin much faster.

@lcshotta 2 месяца назад

Finally, now my AC condenser fan will be consistently working again. No need for a new car yippee

@robertmirto861 3 месяца назад

Thanks !!! 😊

@sasithawijesingha7356 4 месяца назад

❤

@santiagomercant9206 2 месяца назад

How can i bypass the signal wire? Thanks

@rigmaster1 2 месяца назад

As far as I know, you cannot. You need to "command" the fan with a PWM generator like the video, or using an ECU or other electronics. This method is by far the easiest if your ECU is not working properly or if you are using a PWM fan in a different application.