1989 Mercury Topaz Changing Pads

Do you have rear disc brakes or drum brakes? If rear disc (I don't remember that as a opition on the Topaz), Check out this video.

https://www.2carpros.com/how_to/rear_brake_pads.htm

If you have drum brakes, (which I believe you do), check out this video.

https://www.2carpros.com/how_to/rear_brake_shoes.htm

Let me know if this helps, or if you have other questions.

Joe