[Hood Scoop]

On the '97 GMC Jimmy, for a few months now, windshield wipers would "stick" every once in a while. By stick I mean they would stop and a humming noise could be heard from the wiper motor. this would be a momentary thing and they would take off again. Yesterday, they stuck and stayed stuck. After a little tugging back and forth (and getting soaked) the arms "caught" and started again, only to wipe once and stop again with humming resumed.

I was planning to replace the wiper motor tomorrow, but wanted another opinion to make sure this was motor and not pulse board. With the humming, I thought the motor was sticking and was done. But didn't know if a faulty pulse board would cause this problem. Any thoughts? Thanks!