On my 80 i have found that the front and rear both do not spray cleaner. It is full, just getting that out the way now lol. When pressing the button i do not hear the pump come on at all. I then unplugged it from the pump and tested to see if the plug had power, and it did have power when the button was pressed. I think it weird that the back one doesn't spray either. Do they all run off the same pump? What could the problem be?