I found the fill hole, put about 4 gallons of water in pump still don't engage. I don't even hear the pump getting electric power when I flip the switch like I did before. Does these pumps have a fuse somewhere? If so maybe a fuse burned out, I will have to look at that electric diagram again. I only found the switch panel, no fuse box so far. Someone told me the switch box is the fuse box but I doubt it since nothing there appears to be able to be removed to replace a fuse. I think I am going to put in a new water pump anyway, seems easy enough to replace it. No telling how old it is, it very well could be the original.