Why is the ford edge ambient lighting not working?

When the ambient lighting is not working in Your Ford Edge the first thing that You should check are the fuses to the lighting. If any of these are blown or damaged then they will need to be replaced to get it working again. The ambient lighting is also controlled by the screen in Your vehicle. Go to the settings menu for the ambient lighting and then try to adjust them. If this does nothing and the fuses are fine then there could be a controller problem. At that point I would recommend letting a Ford dealership take a look at it because they have tools that can help diagnose and sort through problems with the computer system.