wiper motor

After getting everything back together on the 60, I have no functioning windshield wiper. When I turn them on, I can hear the motor and it sounds I can hear it wanting to move the arms but they don't move. Any ideas on what to do or look for?

The wiper auto stop cover for 68-74 (single upper wiper motor) has been discontinued for some time now Part number: COVER, WINDSHIELD WIPER MOTOR AUTO STOP SWITCH 85146-60070 I have a decent one to copy... however the copy wasn't too good so I had to build from scratch Since I was going...