1987 Ford F-150 windshield wipers not working?

I recently bought a 1987 Ford F-150 and the windshield wipers do not work. When you turn them on you can hear the wiper motor, but the wipers do not work. I know that there is a little fuse box in the dash behind the wiper switch, and I think it may be that but am not sure. Also today the radio randomly stopped working but then started working again, not sure if it could be connected or not. Anyone know what it could be?

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