A malfunctioning switch in the steering column can cause the front windshield wipers to self-activate or not turn off. A failed windshield switch will require replacement.
Car Problem Reports
Plymouth Grand Voyager Malfunctioning Switch in Steering Column May Cause Problems With Front Wipers
Plymouth Grand Voyager Problem
Visitor, 1996 Plymouth Grand Voyager, 46,000 mi
I still have the problem. I haven't been driving this Van because I have other vehicles. We would use this vehicle for highway travels mainly. I love this Van if not for that Windshield wiper switch.