Wiper Motor Doesn't Work

Try loosening the three bolts that hold it to the firewall, then turn it on, grab the motor and move it around in a circular motion.

When I first got my 70 Swinger the seller said the wipers would hang then stopped working all together. Started messing around with it, and like you, had power to the motor, but no movement. Tried pretty much everything then loosened up the mounts while it was on and they started working. Not sure if motor assembly somehow got tweaked on the firewall or what, but its been good for 8 months.