The trailer is plugged into shore power. the low fuel light is on when the batteries are connected.
When I noticed the beeping, the shore power was disconnected and had probably been for a week.
It has been plugged back into shore power for about 8 hours, the beeping is still happening and I cannot locate the source. It's dark and butt cold outside right now to checking voltage will have to wait for daylight.
If I can't find a reason here I'll remove the batteries (2-12V), bring them in the house and charge them. I don't know if my trickle charger will charger them both while they're connected.
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