mine did that this spring when i took the car out of storage. the switch was dead. it would go down, but not up. i was lucky to find one in the junkyard. yours should be easier to find than one for an 83-86. it could be the pump too. or it could be a fuse ( you DID check those, right?)
its gonna take a guy on each side to slowly lift the roof and overcome the hydraulic cylinder. youre not gonna do it alone