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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.[/align]

 

Either run a new wire from the battery, find an empty fuse block that has power and isn't being used or splice into the power wire for your cigarette lighter adapater..... those are the three easiest ways to do it...

 

Thanks sir_nasty!