Well..... I cannot guarantee it - but I think it will serve as a good reminder that these jacks require 12v power to operate. Although the onboard batt gauge read full, I pulled the battery to give it a good check. Meter on the battery only read 11.7v. I checked water levels and it seems the dork who owns this thing (me), omitted that maintenance routine this year -- several cells took a lot of distilled water to get back to level. I have it back on the charger, but I worry it may be too far gone.
I'll check back and post again once I get this reconditioned or replaced - with that, I suspect and hope the jacks become fully operational again. sigh.
M