How do you change a backup light bulb on a 1998 Lincoln navigator?

You have to take the inside panel off the tailgate and if you are just changing the bulb you dont even have to take off the entire panel. It helps to have two people to do this, unhook the panel along the bottom and have one person pull out on the panel and have another look inside it and you will see where the bulb goes. You will be able to reach in and change it.