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Do you know whose slide hardware you have here? Fleetwood usually used Power Gear slideout hardware, but not always. If you can take a photo of the underneath of the room at the ends of the arms I may be able to tell. This can be an adjustment issue or you may have some rollers that are failing and need more repair here. I can tell you this is not a job for most DIY folks and so you might want to enlist the help of a good mobile tech in that area who is familiar with this procedure and can diagnose the problem more directly. Very hard to do from here. Please get back to me if you need more input from me as all follow ups are included in our fee.
Did you take a photo of the arms underneath? I would like to see how these adjust here.
Just checking back in to see if you were able to get this resolved or do you still need additional input from me here?
That is always something to test as one of the major causes. How old are the batteries?
Are they hooked up correctly? And even brand new ones fail with some regularity. Can you take a photo of the hookups so I can see what you have and attach them to your post? And when you plug into shore power, what is the DC volts reading AT the batteries? You should be seeing about 13.7 VDC there give or take a few tenths.