Hey All,
I too have been working on a solution to get the DVD video to a rear screen while still having the nav map on the front lcd. I believe the solution is to splice into the video lead that directly comes out of the DVD changer. To do this however we must determine two things:
1. How do we remove the DVD changer to access the wires?
2. Which wire is the video wire to the front lcd head unit?
We know that the DVD continues to run when you have the nav map up because the audio continues to play. I believe that pressing the map button switches to the nav video wire on the back of the lcd and pressing the disc button switches to the DVD video.
If we access the video wire at the source, it should continue to have video no matter what button you press on the headunit.
Any thoughts, suggestions, ideas?
Bill