tatest wrote:
For my older Winnebago, if I have any doubts about power to move the slides, I will start the engine, because the alternator is a better source of 12V power. It will usually move the slides even if the house batteries are fully discharged.
Good advice; worth a try.
THEN.....the OP needs a multi-meter.
IF the battery disc. switch is OFF it can cause this kind of a problem.....as well as not charging the batteries on some models.
IF the batteries are in really bad shape, that can cause it too....as they will suck most of the converter power and not leave enough for the slide.