Ok, this is great information. So how do I determine which if any module is bad? I see many posts about the general module behind the glove box being a master module with replaceable relays to fix various problems with draw/lock issues, etc.
Some post consider the FSR for the blower to be an issue, but mine was replaced a few years ago with OEM. Your thoughts on difficulty to diagnose. Is this really a dealer/computer diagnose solution only?
Thanks again.

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X5 3.0 AUTO -2001 - 238,000 miles