Look guys, I am not a BMW expert, nor an electronics expert. So if it is possible, kindly provide some less cryptic information.

What is that 100Hz thing?

What I am trying to figure right now is, if it is possible that the mechanic who worked on my front suspension has somehow, somewhere, disconnected that thin wire, and my fan is not receiving a signal to start turning. Since I've verified that the fan receives 13.x Volts, the only thing that can prevent it from turning (I think) is the signal from the DME.

And yes, when I tried the fan, the car was hot (normal operating temperature) and I had switched the air con on, to full blast.

Thank you for any help you can provide.

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John Caradimas
2005 X5 3.0lt diesel
Facelift, Sport packet