HWH jacks and slides

Check all your electrical connections, especially the ground wires. I had similar problems and it turned out to be a bad internal connection on one of the pump mounted solenoids. Working with an HWH tech on the phone, He had me put DW in the driver's seat, key on and hold one of the manual jack extend switches. I was underneath with a probe grounding out every connection on the pump solenoids. When I grounded the bad terminal, the pump motor activated and the jack extended. At that time, HWH was using White Rogers solenoids which were not very weather proof, moisture got inside and corroded the wire. They have since transitioned to Trombetta solenoids which are more suitable for the job. A new solenoid cured my problem. I also fabricated a shield to keep the road slop from the right front tire away from the HWH package. Mine is under the entry steps in front of the RF tire. And, YES, I took precautions to insure the coach did not come down on me and crush my aging body.