All the drawings are listed by year, model and then a specific floorplan, so we really can 't do a check to be more specific but one of the big things would seem to be loss of the coach 12VDC power from the coach batteries.
Part of the thinking on that is when the cord is plugged in, the converter is producing 12VDc power and enough to be able to run things plus store some extra power in the batteries!
When the batteries are not proving power and the plug is out and the converter stops, all the 12VDC items like lights water pump and vent fans stop. The controls on frig, Air conditioner and furnace are also 12VDC powered, so they stop as well!
One way this can happen is if the coach battery disconnect get pushed to the off position! It may not be noticed at the time due to the power actually used is coming from the converter--- until it's also unplugged and dies!
It might be this as an easy thing to check but it might also be other things, so if the first idea is not it, perhaps try a simple test to verify a few things.
Assuming the RV engine is still able to start, try starting it and then test a few things like the lights.
If the lights and all those things come alive, the explanation is that power from the engine alternator and chassis battery are now connected together with the coach battery. That connection lets the chassis battery run things when the coach battery will not.
That would mean you need to check the coach batteries and find why they are not connecting to the fuses which feed power to so many things! Are they dead? Maybe a dirty battery cable is cutting off flow?
Do a few checks and let us know which RV you have and we can do a little more looking for solutions???
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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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