I have searched everywhere and can not find any help that has provided a solution to my problem. I have a 2010 I recently purchased with a stock back up camera and stock navigation. When I put the truck into reverse I get a black screen. I have checked all my fuses and they all checked good. I am not receiving power to the camera via the gray wire back at the harness where the camera plugs in. I'm looking for a diagram or any insight as to where to go from here. Where does the gray wire get its power from, Ive seen all the diagrams of the back half of the truck but none showing where it's fed from. I tried sending power to the camera by adding a power wire to the gray wire but still had a black screen that shows "settings" and "check your surroundings" any help would be greatly appreciated!