That button is for the voltage converter that goes with the rear entertainment package. When you have the screens added to the headrests, there are coax and and a 115v AC plugs in the back of the center console. It allows you to plug in a game system or whatever right there and it will show on the rear screens.

I thought the sunroof controls were on the ceiling. You sure the other switch you saw wasn't for the Crewmax rear window?

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2007 SR5 Crewmax 5.7L 4x4
Mods: nerf bars, Truxedo tonneau, radar detector power, fog lights, black billet grille, rear differential breather, parking sensors, Line-X, power tailgate lock, hood safety latch mod, one off driving lights behind grille, Pioneer NAV w/ OEM camera, Flowmaster 50 SUV dual/dual, blue LED dash lights, Volant CAI
All mod descriptions and pictures © 2007,2008 by Toxarch. They may be copied only for personal use and the mods may be done for non-profit only.