I'm not sure the wiper motor is the problem. Even if it is bad, it needs power to work. That leads me to think there is an issue with the switch itself.
If you want, I have attached the directions below for replacing the rear wiper motor. These are specific to your vehicle.
Let me know if you have questions or if I can help in any way.
See pics below.
Images (Click to enlarge)
Wednesday, January 19th, 2022 AT 7:32 PM