Hi guys putting together a car pc with the factory 2004 nav pop up screen, my car is a non nav car. My quesion is where does the navi control plug in to illuminate at night? Dont want my other buttons lit up and not those.

 

There's a harness that only the navi-equipped cars come with that originally provides illumination power. You'll have to get a wiring diagram from the field service manual (http://psedog.com/cars/fsm/g35/coupe/2004/av.pdf) to find out which wire you need to supply voltage to in order to illuminate those buttons.