The Joystick uses a GROUND signal to the HWH pump motor. Either you have a DEAD/BAD battery cable to the Pump solenoid(solenoid is mounted on the pump) or that solenoid is bad. Find
your pump. On a Tiffin your year, it may be up front by the radiator. The solenoid has 4 terminals on it. 2 large and 2 small. Take a heavy screw driver and jump between the 2 large posts. IF the pump runs, then the solenoid is bad. If it does not run, then either your battery supply 12 volt positive heavy cable is dead or corroded or the pump motor is bad. Doug
http://www.hwhcorp.com/ml23934.pdf
