Jeep 2002 Grand Cherokee (4.0 six 4WD) Wiper issue.?

My 2002 Grand Cherokee has developed a strange front wiper issue. The wipers still function, but do not "park" properly. The wipers will halt anywhere on the windshield at times. Takes fiddling with the wiper switch to get them to park. Anyone's guess ? Bad wiper motor ? Bad "park... show more My 2002 Grand Cherokee has developed a strange front wiper issue. The wipers still function, but do not "park" properly. The wipers will halt anywhere on the windshield at times. Takes fiddling with the wiper switch to get them to park. Anyone's guess ? Bad wiper motor ? Bad "park sensor" ? Any guidance will be appreciated.
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