94 explorer with wiper problems

The wipers do not work properly when on any of the delayed settings. Best way to describe it is they stutter across the windshield and do not cycle down to the stop on any setting when shut off. I have already replaced the switch lever as it didn't work properly. I guess whats left is the motor or the relay unit under the dash, but I don't want to spend money I don't have to. Any ideas?

Response:
it's either the motor is bad or the linkage is not secure.

The windshield wipers keep stopping on me and I have to wiggle the small harness to get them to turn on

Wiper Motor Pulse Board

What you need to do is unplug the harness, remove the 3 screws on the back of the wiper motor assembly. Remove the "pulse board" ( this is what the harness plugs into) there are two small contact points that stick out and have grease around them . clean the dirty grease, bend the two contact tabs out a little and reinstall it and it will work just fine. Extremely common !!!! The other option is to order a new one from the dealer( do not buy re man/rebuilt from aftermarket place) . Removal of the wiper motor is not necessary.