hey guys! unfortunatley my first post on here is with a problem with my x5! its a 2006 e53 le mans, with wide screen and satnav.
basically i have sound, i can control radio volume and station through the steering wheel controls, but the display on radio is blank, i have tried a working bm54 and nav drive, issue is still the same.
so today i ripped out some of the wiring and figured out there is no power coming to my nav unit. the nav unit then feeds power to the display, i ran 12v into the sat nav drive and it came to life, and also the display, all working fine. so now i know that the issue is with the power feed to the sat nav drive,

does anyone know where this power comes from? its the red/white trigger wire. (i have the constant power in the red/grey wire) is it fed from the bm54 unit? or from body control module? foot well module? thanks for any help guys !