How to test the rad fan

FESTER boggie fan shopping in UK experience

this might help any shopping you have to do from the UK

see around post 12 etc

http://www.bimmerfest.com/forums/showthread.php?t=853867

Boggie Boggie is offline
Boggie
Location: Worksop, Notts. UK

Join Date: Jul 2015
Posts: 6
Mein Auto: E83 M Sport auto
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X3 Cooling Fan not working
Hi Swampx,
I decided to have a look at the fan assembly. As you say, it is very simple to remove it after taking off the airfilter housing and inlet duct complete with Mass Air Flow. 2 screws to remove, it unplugs and it just lifted straight off.
I tested the supply voltage with my multimeter and there was 12 volts at the supply side of the plug from the battery.

I removed the fan assembly and put 12 volts across motor side of the powercable, but the motor did not run, so I suspect it is the motor

There is another sensor mounted on the top right of the fan assembly(looking from the front of the car), which the chap at the BMW shop said was the aircon sensor. ( it loked like a small microphone with a mesh coverI cleaned this with brake cleaner but wasn't able to test any further. Not sure but I think this sensor links through the aircon switch.
I must buy myself a Bentlu manual as you recommend!

I have taken the precaution of ordering a raplacement fan from one of the BMW dealers in the UK who run an online shop and were able to give me a 20% on-line discount. It comes with a 2 yearwarranty direct from Germany, and If I can find some other reason whythe fan isn't working then I can return it and get a refund within 14 days.
I'll have a look at other posts and your troubleshooting guide and see what I can do.

FRIG AIR coolant fan pic

a pic of the BMW aftermarket fan from frig air attached

pull down screen shot for private messaging to tibbles

below shows the pull down for sending an email to tibbles who lives in UK and purchased a fan

read post 2 and 3 above

>the fan wiring contains wires/wire that sends control voltage/signal to the fan electronics

>go thru the fan start test procedure

>you can rig up a lower/higher wattage fan with its own relays and switches and poboy it BUT there'll be no control from the engine computer (called a dme by bmw) like with the original

> best bet is to get organized with the software to do your own activations of components and get the wiring diagrams etc...see example below....best wishes

firebull has just replied to a thread you have subscribed to entitled - E-Series Standard Tools & SP-DATEN: Software Download Links - in the BMW Coding and Programming forum of Bimmerfest - BMW Forums.

This thread is located at:
http://www.bimmerfest.com/forums/showthread.php?t=638188&goto=newpost

Here is the message that has just been posted:
***************
Hi Shawn!

Can you please help me too?
I need the software for:
Z4 35is - E89 Series Built 2010 and 2012.

bad wiring too

#14 Report Post
Old 05-27-2016, 02:02 PM
Tmurf Tmurf is offline
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Location: Ny

Join Date: May 2016
Posts: 5
Mein Auto: X3
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I got the fan fixed. It was the signal wire at the main plug for the fan. I tugged on it and it pulled right out of the connector. The insulation was intact but the wire inside was green and disintegrated. Ran a new wire and the fan works as it is supposed to now. Thanks for all the input ! Guess it's always good to check the simple things before replacing expensive parts !