Your 2004 is a little different than mine. I'm looking in the Bentley manual at diagram ele-166. I'm assuming you have the automatic climate control (IHKA).

You should be getting power from fuses f48 7.5A and f34 7.5A


The wires you are looking for from f48 is red with violet. Wire from f34 is green with yellow. Brown (probably not orange) is ground.

Yes, use the multimeter to measure the voltage from the power pin to ground, taking care not to short anything with the meter probes.

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David.X5
2001 X5 4.4i Sport
SOLD! at 160k miles