well you should have two pumps. The one pump the fills all three tanks and a pump the empties. One for each bag. Check to see if you hear the solenoid click. If you hear it, then it is OK. The solenoid opens the valve and the water starts flowing. My drain pump is in the ski locker. Hit the drain switch and either put your hand on it or your ear to it. Make sure the lights on the switch are lit. If they are, then the fuses are good. If they are not, then the fuses are bad. for that solenoid and drain pump. Hope this helps.