How do you replace a turn signal light bulb on a 2001 Mercury Cougar?

I have a 1995 Mercury Grand Marquis and my mother has a 2003 and they both are the same, so yours probably is also. After you pull the trunk lining away so that you can see the metal, there are 3 large black plastic wing nuts that you unscrew. Once you remove those, the tail light section will come out from the front and then you can get to the bulbs to replace them.