Recent history: Car sat for 2 weeks (drove intermittently to keep Battery charged) due to re-tear of driver's side CV Boot. I got the parts in and did the repair Saturday. At this time I also did a tranny fluid change. Upon starting the engine and running through the gears to top off the tranny fluid I notice the climate control will not turn on. BUT I cannot pin point when exactly it stopped functioning due to not driving it everyday. It very well could have been not working 2 weeks ago. I replaced the CV boots using the inner boot/ tri-pod gear shortcut. The only bolt I undid was the lower control arm. No electrical harnesses were touched.

After doing a bit of research I think it is purely coincidental. I have read that the AUX water pump (the 2nd one that feeds coolant to the heater core) could be bad or there could be a short in the wiring to it. Good fun. My next step is to unplug the Aux WP and replace the fuse to see if it stops popping. Then I will know my culprit.

Does anyone know how I can access the axillary water pump? From the top, bottom? I took a peak last night but could not see it.

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2005 BMW X5 4.4 Sport Upgrades:

Dinan Cold Air Intake
Dinan Stage II Software
Akebono Euro Cermaic Pads
Brembo Rotors
Titan Silver Metal Gauge Rings
DICE IPOD Module
Hardwired Passport 9500ix Radar/Laser Detector