tphillips was gracious enough to email a PDF of the wiring diagram. I am having a heck of a time debugging my 12V
woes on the main overhead light. I've checked all 12V connections down by the battery and they are solid.
So today I decided to apply 12V (battery charger set to 2 amps) to the wiring at the kitchen light (first light in the circuit). Miraculously the kitchen, main overhead and two front reading lights all worked. I was able to verify that the "mystery switch" adjacent to the entry door was a master power switch for the main overhead light. At one point while my additional 12V was connected I heard a clicking sound. I disconnected the battery charger (12V source) from the kitchen light and all lights continued working.
Is there a relay in the Univolt that might do this? But if that were the case it would have killed all 12V power....
My next thought is that perhaps these little black items down by the battery are the circuit breakers that Diesel1 spoke of (see pic). But when I check them with a multimeter they all appear to be functional (even when the lights don't work). Does anybody have any insight they can offer. Regrettably, when I went out to my trailer later in the day, the lights worked briefly and then quit. ARRRRGGGGGHHHHHHH!!!! Now I know why I am a mechanical (and not electrical) engineer. Any insight greatly appreciated.