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Join Date: Dec 2002
Location: Cleveland Ohio
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M Logo Problem with Auxiliary fan on 94 325 IS

I have a 94 325 IS I recently changed- Fan clutch , Radiator, Thermostat & water pump. System was bled properly. I do not have a problem with overheating. But after all the work I noticed that the aux fan does not seem to work. I checked the fuses. Should the fan come on with A/C compressor? It does not come on with A/C on at this time. The plug for the fan is plugged in. I would like to fix this before I do some serious damage. Any help would be great. Thanks Vic

Old 07-04-2006, 11:31 AM
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The aux fan should come on with the A/C Compressor. There is an Aux Fan relay that you should check.

The fan is also activated for emergency cooling by the fan switch on the side of the radiator. You can jumper the fan on at the fan switch. I'm pretty sure the fan switch delivers 12v but I would make sure before jumping it.
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Old 07-05-2006, 07:25 AM
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Fan switch

I found the switch on the side of the radiator . It has 3 wires going into it . do you know which wire controls what . I hate to short something out. Thanks Vic
Old 07-05-2006, 03:03 PM
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HPDE Instructor (BMW / PCA / Apex)
Here: 1997 M3/4 Byzanz/Magma ~ 2006 Yamaha R6 ~ 1997 R1100RT ~ 1991 Ford F-150 5.8l ~ 2015 Kia Optima
Gone: 2001 330i Silver/Grey ~ 98 Camry V6 ~ 97 Camry I4 ~ 97 Mazda 626 I4 ~ 93 Sentra SE-R ~ 88 Toyota Truck I4
Old 07-06-2006, 06:58 AM
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