I've seen several different devices that add a y-adapter that allows you to connect an external video source to the factory NAV screen, but I haven't been able to find any detailed instructions that show the best place to tap for power. Is it possible to tap into the power wire for the NAV system itself? Which wire is this?

Thanks for any replies.

 

no Y-adapter for the factory navi it's a RGB adapter about $250 -$500 avelectronics sells the module that adds a video input to the factory navi. I used a pioneer GEX-P7000 tv unit modded to work on the factory navi it adds TV tuner ,2 video input and a rear output for headrest screens and video switcher and a RF modulater for audio. it runs for $100-$250 on fleebay but you need sone electronic experience to do this mod or you can damage the navi. where the AVelectronic one is plug and play!