[p911sc]

Yurick,
Thanks for the toughts. It seems like it should be something obvious. I replaced the motor several years ago and I still have the old one laying around so I opened it up. There is a metallic disk connected to the driveshaft. There are 2 contacts connenting to the disc. Where one contact touches the disc, it is continuous metal all the way around (entire circumference). Where the other contact touches, there is a plastic insert (representing about 10 degrees of the circumference), which breaks contact at the a certain point in the rotation. I am guessing that the wiper switch on the steering column determines which contact is used. When switched to the off position, it selects the contact with a radius that touches the plastic insert and the plastic insert breakes the circuit and stops the wipers at the park position. I am stumped as to how this could change, short of a bent linkage. I am hoping to play around this weekend when the weather gets a little better.