Winnebago Help!! Regarding leveling system

[bruce642]

I have a 1994 Winnebago Adventurer 34 foot with 3200 original miles on it I just purchased. Took it out for a two week trip and the leveling system worked fine. Now I only get two lights that come on out of the four and none of the jack want to come down. What should I check first??? I would appreciate your expert advise on this issue since I've never worked on a system like this before (it's the HWH lever controlled leveling system with seperate controls 9000lbs).
You can also email me at bansheeboy1@verizon.net I Thank You all for your input. Please put Winnebago in the subject line so I know it's not spam.
Thanks again
Bruce

[RV Mech Tech]

Bruce - you can go on the HWH website and they have all the service manuals for their systems online including troublshooting charts - you can identify your system by the control pad part number on the face of the control or as you mentioned 'seperate controls' and that sounds like the "joystick control' on the floor - seperate levers for each jack - thats all available on the HWH site - since your RV is a 94 with very low mileage its possible that something has started to stick or malfunction from sitting for a long time - I have seen an RV that had 10K on it and it was completely rusted from sitting so anything is possible- let us know what you find.

[FleetMan]

In addition to the advice from RV Mech Tech, when trouble shooting my system with the help of an HWH tech on the phone, He had me use a test probe and ground out the various terminals on specific solenoids since the HWH system needs to complete the ground circuit for the components to operate. Using that procedure, we found a bad master pump solenoid which had a broken/corroded wire internally. As soon as I completed the circuit on that terminal, the pump motor began to operate.