Wiper Motor Doesn't Work

My guy who put the wiper motor in told me that he pulled the wiper motor out of the car and hooked it to a battery (why does that sound fishy) for a hot lead and the main shaft on the motor simply would not turn. He also checked the linkage under the dash to ensure that it moves freely and seemed to think that it did. Explain what you mean by park assembly.



What do you mean by the clocking is off. How could we adjust that?

Park assembly is what controls the motor when you turn it off and it returns to the normal down position on it's own.
If the gear drive is jammed up it will stop the motor from turning.

Clocking means it might have been put in the car and hooked up in such a way as to jam up the linkage arms when it tries to move. (like it wasn't in the off position when installed but the wipers were put on anyway and binding)
It's not something that is adjustable.
If it doesn't turn with the arm for the linkage off the motor something is jacked up inside the motor or drive gear.