Taken from 12volt.com
havent tried myself yet...
green wire grounded (no connection to e-brake)
:start car and at "starting pioneer navigation screen" flicker your lights
:you have to hit "okay" to confirm connection is legal
:you also have to hit "okay" to confirm the e-brake isn't properly connected
:the dvd will then play regardless of the position of the e-brake
:you can switch in between navi, dvd, am/fm, and library
green wire properly connected to e-brake
:e-brake must be off
:start car and at "starting pioneer navigation screen" flicker your lights
:you have to hit "okay" to confirm connection is legal
:the dvd will not play if e-brake is engaged and then released (must restart car and redo the whole process in order to get dvd w/o e-brake on)
:you can switch in between navi, dvd, am/fm, and library
when i say "flicker", it means the first initial screen will show a message at the very top stating the pioneer navigation is initializing and at that very moment you turn your lights on and off.