That put it into the age group when they have stopped posting the really good info on wiring that let us chase a specific circuit and now give us far less, so we might do some random checking.
Do you have a meter to test the battery charge/voltage? That would seem to be a place to start since those things work when the engine is running, it sounds like we can move beyond breakers, fuses, as they are the same whether the power is coming from the engine alternator and start battery or from the coach batteries.
My "theory" without being able to actually see drawings of your RV, is that we can say the green line is good as the lights work when the engine is running which makes the solenoid connect the two batteries together.
But if the engine is not running and the boost switch on the dash is not pushed, the solenoid does not connect the two together, so if there is a problem with the coach battery getting or holding a charge or if the ground to that battery is not making connections to ground, power does NOT flow to the lights, etc.
Green line is good but the yellow is suspect to me. Kind of out on a limb without definite drawings but that is where I would look.
First to see the battery is charged but I would guess yes if it is not totally dead but if the ground cable is not good on both ends, the circuit is open and nothing happens.
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Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!
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