Have RV Questions? Ask an RV Mechanic Online.
No wiring diagrams that know of. It should have switch just inside the door that controls that. You may have a loose connection in the fixture or bad switch or bad wiring. Use a 12VDC test light to track this down. I can direct you on this if you need more here. Just get back to me as all follow ups are included in our fee.
Just checking back in to see if you got this resolved or do you still need more assistance from me here?