A little additional information since the subject was brought up:

The light blue/black wire is the main power lead for the power windows, moonroof, and rear slider. It is fed by fuse 601 in the central junction box and is fused with a 30 amp fuse.

There are also two pink wires coming off of the central junction box that are both fed by fuse 42, which is rated at 15 amps. One of these wires is the power circuit for the power door lock switch, and the other runs to the radio and serves as the "turn on" signal. The radio uses very little current on this circuit as it is mainly powered by fuse 11. The pink circuit can be used for light-load accessories and as an amp turn-on lead.