Had a right side rear camera go out.  After removing the right mirror assembly I found that they assembled the yellow blinker lens in the mirror 180 degrees from how they should have.  This grounded the power wire to the mirror chassis.  I rotated the marker/blinker and the camera function is restored.  Nothing like reading the instructions!  Thanks to Fleetwood for including the wiring diagrams and install procedures in our documentation so I could troubleshoot.