Climate control not turning on-2004 X5

[apocalapsi]

Hi I have a climate control that has no power. I checked all the fuses in the glove box any the trunk and all are good. i removed the unit and all connections are good. How do I check if its getting power? Is it the plug on the drivers side that has back and white wires cause there is no voltage to it. How do i check if its getting power? Ive read somewhere that it could be a capacitor in the unit but that only controls speed not overall power. To complicate things I noticed my windshield must be leaking as there is water in the footwell on the passenger side. Could water there affect any wires going to this unit and how do i check?