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.

Asked by for the 1990 Mercury Cougar
1 answer
Either the motor itself is bad, or the "transmission" for the wipers (link and pivot assembly) could be broken under the cowl.