Our 2018 GT FBQ has been in storage and connected to shore power over winter. When I went in to do some work a couple of weeks ago, all was well. When I went in yesterday, the 12v
circuits are dead - no lights, no fan, no stereo. However, the jack, propane detector, and inverter are all functional, and the batteries are showing 12.38 volts. Also, 12.38 volts downstream of the 30 amp inline fuse near the batteries. I checked the Use/Store switch, and the relay clicks, so I have power as far as the relay. However, the red indicator light just flashes and then goes out. Voltage measured at the fuse block is 0. No fuses that I've checked are blown. Behavior is the same regardless of whether or not I'm on shore power, but my current setup is with shore power disconnected.
One other thing I noticed that may or may not be related is that when I cycled the circuit breakers, all except the GFCI functioned normally. However, originally, the GFCI was in the closed position. But when I flicked it open and then tried to reclose it, it refuses to stay in the closed position. I don't know if this is because there's no 12v
power available, if a possible short in the GFCI circuit keeps the 12v
from engaging, or if this is completely irrelevant because it's on the 120v circuit.
Searches here would suggest the converter might be at fault. But the fact that the relay is clicking and the inverter is working make me think it's also possible that the relay has gone out and won't fully toggle to the "Use" setting. Also, since the GFCI circuit breaker was in the closed position when I started looking for a problem, I'm inclined to think it is probably a coincidental second issue - but I'm ignorant enough about this circuitry that I can't rule it out, either
I open the floor to discussion, and thank you all in advance for your advice!