The windshield wiper motor is protected by a circuit breaker and a fuse. If the motor overheats due to heavy snow, etc., the wiper will stop until the motor cools.
If the overload is caused by some electrical problem, have it fixed.
Chevrolet Cobalt Service & Repair Manual. Exterior Rearview Mirrors
1.
Release retainer located at top of
mirror trim panel.
2.
Lift upper door trim panel upwards
to remove.
3.
Disconnect electrical connector.
4.
Remove mirror mounting nuts, ...