93 voyager rear wiper problem

I have a 93 plymouth voyager but I am having problems with the rear wiper it has been this way since I purchased it. It is stuck in the upright position and I don't have a clue how to fix it to make it work again or to even get it to lay down and not block the rear window. Can anyone help with this fix?

I had a similar problem with my 93 T&C. Be careful not to force use firm gentile pressure because you may damage the wiper cam that turns the shaft the wiper is mounted on. My guess is either you have a corrosion or something binding the mechanism that turns the wiper, wiper shaft is frozen or motor is frozen. First I checked the fuses then took off the rear panel on the back door. I made sure the mechanism that turns the wiper was free. I unplugged the motor turned rear wiper on and checked for 12 vdc at the plug. In my case the power was there so I replaced the motor and has worked fine for years. It’s a relatively simple job easy to get to and I would think a used motor would cost only a couple dollars at a bone yard, I would guess many different years rear wiper motor would work but best to check for sure.

How do I get the panel off the rear liftgate of the 93 Voyager to get to the windshield wiper to replace it. I removed all of the screws and popped the outside pins but the panel would not release where the window and door meet each other. I could not see any more screws or pins to remove.