Can't find 12v switched wire in headliner...help.
I'm looking to hard wire my radar in a 2012 X3, but cannot find a wire in the headliner that I can tap 12 volts which turns off when the car is off.
Somebody here must have done this...advise on which wire to use, please so I don't have to run all the way to the fuse box. Pics if you got them. THANKS.