I am a long way from service and have a 20V with the factory ballast (4 tanks, with center pipe with four fill pumps on it and one pump to empty attached to each tank). Both rear pumps for filling are not working, and one for emptying the rear is not working. I found four 5 amp fuses near the switches on the dash and I assume they are for either emptying or filing and they are all ok. I have extra pumps, but I tested the circuit on the rear one that is not working and there is no power to the pump, and with three going it seems pretty unlikely that it is a pump problem for all at once. Does anyone know if there are more fuses somewhere? I can't seem to find any and there is absolutely nothing in the manuals. Thanks for the input...