windshield wipers on 1990 Mercury Cougar

I have a 1990 Cougar with 115,000 miles. the windshield wipers stop working. You can hear the wiper motor when you turn them on but they do not move. All suggestion welcome.

1 answer
Either the motor itself is bad, or the "transmission" for the wipers (link and pivot assembly) could be broken under the cowl.