Radiator fan will not turn on normally

RMBENNETT

MEMBER
2001 VOLKSWAGEN JETTA
2.0L
4 CYL
2WD
AUTOMATIC
115,000 MILES

My girlfriend recently purchased the car listed above and did not realize that the radiator fan was not working when she purchased the vehicle. I have spent the last week changing out a bunch of parts to try and resolve the issue but have been unable to do so. So far I have replaced the Fan Assembly, Fan Control Unit, Auxiliary Fan Switch and the Engine Coolant Temperature Sensor. I have already gone through and checked to make sure the fuses are all good and everything seems fine. I can however get it on by pulling the #16 fuse, but then it runs non stop until you replace the fuse. Any ideas what the issue could be? So that my girlfriend will not need to remember to pull/replace the fuse whenever she drives (because she totally will not).

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
47,636 POSTS

Hello,

There are two different radiator cooling fan system weather or not you have auto AC or not so I have both wiring diagram set so you can see how the system works. I would start by checking for power on both sides of the fuses # 5, 16, 8 and 3 because it sounds like its back feeding.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Here are the fuse locations. Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.

Cheers, Ken

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