Wipers have stopped moving but wiper motor runs. on 1995 Toyota Camry

Wipers will not move but motor seems to be working fine. If I manual move the wipers they will return to the home position but will not move back and forth on their own. What is the problem?

Asked by for the 1995 Toyota Camry
or wiper arm nuts are loose under flip up covers
1 more answer
Wiper transmission linkage seperated , need to inspect and replace failed part or assembly.