Electrical issues

[Bechard]

2018 forest river vibe 323 QBS

Not sure if anyone can help. Last fall when I went to winterize my trailer, none of the slides would work or stabilizers, tongue jack, awning. But fridge which is a residential, lights, etc worked fine. Checked fuses, breaker’s everything was ok. Trailer was hooked up to 30 amp shorepower. Battery showed full charge. I disconnected the battery and reconnected and then all the stuff the did not work, worked and the other stuff did not. I took the battery and had it tested and it showed battery was ok, I cleaned up all connections and put Dilectic grease. The slides, stabilizers, tonge jack, awning work but the lights do not. Now this spring when I turn the heat on, on the thermostat, the blower fan turns on for 30 seconds then shuts off, ran stove and BBQ to try and purge the line and the work ok. Not sure if issues are connected and at a loss!

[Bama Rambler]

How many cables do you have connected to the battery(s)?

Is it possible that you accidentally switched polarity on the battery cables?
Do the switches for the stuff that's working operate in the correct direction or are they reversed?