Mine had a circuit breaker on the powerwinch battery positive cable right at the battery.
I would jump around that circuit breaker and see if the roof will raise; ONLY A SLIGHT AMOUNT ,FOR A SECOND TO SEE IF IT IS THE PROBLEM.
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Trailer: Lifted 228BH, heavy duty springs and Yokohama tires DELAMINATED ROOF TV: 2016 GMC Sierra Z71 4x4 CC, SLT
Spare TV: Two Alaskan Malamutes
Living somewhere in ID; previously lived in Moab UT; previous to that, don't ask!