How do you replace the rear window wiper on a 1993 Mercury Sable wagon?

2. Open the liftgate.

3. Locate the rear wiper arm. It is attached to the rear window by a single nut.

4. Use a wrench to loosen the nut.

5. Remove the wiper arm from the rear window.

6. Remove the old wiper blade from the wiper arm.

7. Slide the new wiper blade onto the wiper arm.

8. Reattach the wiper arm to the rear window.

9. Tighten the nut until it is snug.

10. Close the liftgate.