Before you dig too deep. The dockside water should be downstream of the pressure water pump. When you are hooked up to the shore water, it is the water pressure that is delivering the water to the faucet. However the freshwater tank is is not pressurized. That comes from the pressure pump. You would need to first make sure the pressure water pump is turned ON. There should be a red, lighted switch somewhere (usually in the Galley). Turn that on first, then see if the pump turns on when you open a faucet. That is the most common problem. Then if it still doesn't work, you will need to leave the switch on and check the positve and ground and make sure you're getting 12v to the pump itself. (If you can locate the pump). I'd start with the water tank or teh shore power and trace from there.
Best of luck.
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