I need an unswitched (always on) 12VDC power source somewhere in the interior of the car. The back (I have a wagon) would be best, but anywhere would do.
The cigarette lighter, and the 12V source in the center console are both switched, ie. only on when the ignition is on.
Every fused circuit in the fuse box at the driver's left knee is also switched.
Brake lights, rear wiper, will both only be on when the brakes or wiper is operating.