if it still turns, it's worth checking if the knuckles have popped out, though you might need new sockets
you may also find that the wiper arms are rusted to the studs. an universal puller would help if you can't rubber mallet it off. either way, you'll see that it's not much more involved than a plug, and 3 bolts or studs to get the entire ***embly out
Does the motor make any noise? or is it just silent?
If its making noise then the linkages are probably worn and popped off, if its silent its worth checking the fuse first and then if the spindles are actually free and not seized in the mounts.
There are rebuild kits available for most wiper types.
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