On the Ford chassis the reservoir will be in the front to the right of the of the radiator (left when looking through the front access hood). Does the pump run? Do you get an alarm when you power on the control pad? The level would have to be really low for the jacks not to try and go down at all. The transmission need to be in park and the parking brake applied for the jack to work. The house battery disconnect needs to be on also.
Chuck & Teri, 1999 35 ft. Dolphin 5350, F53 Chassis with tag axle, Chassis build date 1/99 in Mexico, Banks System, Trans Command, Air Lift Air Bags on rear, Koni Shocks, Blue OX TruCenter, TigerTrak track bars front and rear, Roadmaster 1-3/4" rear auxiliary sway bar, 2013 VW Passat TDI SEL Premium, 1994 36 ft. Avion 5th Wheel. FMCA #F430129