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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)

E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 08-22-2011, 08:41 AM
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bimmer765 bimmer765 is online now
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Mein Auto: 325i
aux fan high speed relay

I was looking at my fuse panel and it shows the high speed relay for the fan, is there anyway to test this? When we had the 100 degree heat here in IL I don't think I ever heard it hit the high speed, just low.

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Old 08-22-2011, 09:19 AM
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ZeGerman ZeGerman is online now
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Mein Auto: 1998 BMW 328is
Yes, you can test it by removing the temp sensor plug on the top of the radiator and jumping the terminals. It has three terminals - connect a wire to the middle terminal, and then connect that wire to each of the outer terminals separately. You will then know if both your low and high speed relays are working. The key must be in the number 2 position.

Additional details in the troubleshooting portion of this DIY guide:

http://www.dvatp.com/bmw/diy/aux_fan/
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Old 08-24-2011, 02:12 PM
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I switched my a/c compressor and high speed auxiliary fan relays and now for some reason they both work now.

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