Hi, I have a cruiser boat and have been trying to test the bilge pump and other electrical systems on the boat only using shore power. The last time I tried this the galley lights worked, this was without an engine and battery, only shore power. I did not have the key then so I could not test the bilge pump. Yesterday I found the key and tried the galley and bilge pump and neither of them worked. The amp reading said 120 so i know that it was receiving power but nothing worked, not even the galley lights. What seems to be the problem?