do you happen to have TWO switches for the water pump - one above the entrance door/or inside at your control panel, AND one in the wet bay?
if the switch is off, the water pump should have no power, unless your switch is bad.
a symptom you describe, though, is typical with RV water pumps. if any slight water drip or air leak is had, the water pump will power up, even for only a second or so, every now and then, even when you are not using any water.
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the Turners...
two Campers, two Electric cars
former diesel pusher traveler
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