How do you change windshield wiper motor 2002 grand marquis My wipers work but stop in straight up position I assume I need a new motor?

The wiper system has a stopping point on the motor, or a rest position. If your wipers are straight up then the wiper control arms are set wrong. go through the entire wiper system, looking for loos bolts or joints or bolts. The motor seems good, its just an adjustment issue.