I have the 2001 Venture with over 92000 miles. Mid-Summer I noticed that when you turn on the back wiper, it moves all the way to the other side then just sits there. It makes a noise like the motor is trying to move it, but doesn't come back. Only way to get rid of the noise is the turn it off them move the arm manually back into the original position. What's wrong with it? Motor sounds good, but I'm not sure.
Cam could be stripped the panel will come off the back tailgate you will need a clip tool to pop the clips loose. Start at the bottom and work up to the window this should let you get to the wiper motor