The fan I'm talking about can be seen here:

RealOEM.com BMW E53 X5 4.4i Pusher fan

I really would like to test it before replacing it! I have checked fuse #61 in the glove box and it's good. I guess I can check the connector to the relay thats mounted on the back of the fan next but the fan is PWM controlled so I can really only check voltage up to the fan.

Maybe it's time to dust off the old oscilloscope



Ben