We have a 2008 Horizon 40fd and recently the 12 volt power to all the interior stuff disappeared...wonder if anyone knows where to look for a 12 volt breaker or fuse? I have the coach plugged in to a 30amp land line but nothing 12 volt works. I find the 12 volt circuit breakers in the front driver side compartment but nothing labeled "battery charger" I don't know where to look now for the suspected blown breaker or fuse...anyone know how to help this old man?
Have you checked the status of your batteries? What is their charge level. Is it a fuse problem or a battery issue? Your 110vac to 12vdc converter may have also failed.