I have a fuse in the bedroom 12 volt distribution panel & also a fuse at the water pump. The fuse at the water pump should not be hard to find, just trace the red wire, it is an inline automotive type fuse.
My pump uses a latching relay which may also cause a problem.
Intellitec Water Pump Controller, 10 Amp, Latching, 00-00145-100
There is also a relay used in the system.
You may check the wiring on each of the pump switches to make sure none has loosened and at the water pump.