ok, i know it was a stupid move but i have issues that are clouding my thinking. i was putting two new 6 volt batteries in for the coach and hooked them up backwards. i now have no 12 volt lighting an...
My "guess" is that you blew the main fuse coming from the batteries. Mine is behind a black plastic cover so it is not readily visible just by looking in the compartment. If you don't see it right away, I would start looking behind any covers in that area. Also, I would check for blown fuses labeled 12v lights in your main fuse panel.