Another HWH Leveling System Problem

sealevel ram wrote:
I have the HWH 625 automatic leveling system on my motorhome.
The touch pad does not respond or light up to any commands, auto or manual. The slides work fine and the little light comes on when I operate the slides. Brake is set and transmission in park. I have tried ignition switch in start, acc, and off. The system worked fine in the past, but became intermittent, and now nothing at all.

Yes, I have downloaded the service manual and gone through the troubleshooting matrix. There is not anything in it that covers my specific condition. All the required lights in the control box come on as required.

Yes, I know that I can call HWH and wait 2 to 3 weeks for a return call and advice.

I would like to know if anyone on this forum has had the same problem and/or some suggestions to test the system or possible fixes.

Thank you.

sealevel ram,
Well Sir, you don't say what kind of rig, diesel, gas, what? It's not overly important here but, it may help. Now, as Dennis has suggested, since grounding is usually at the top of the list when it comes to electrical problems with the automotive world, I'd start there. And, as I understand it, there is no ground to your system unless the parking brake, (mechanical if gas, air/spring if diesel) is set. It is then, that a ground is supplied. At least that's the way I understand it to work.

So, if the switching in the parking brake system i.e. "interlock" is what allows the HWH system to work, then there is a good place to start. I'm no tech, but, thought I'd throw this at ya, especially since we have the same exact system. Good luck and please post if you've found the cause.
Scott