Tail light not working

If it is just a bulb, you need to remove the light assembly. Open the trunk and behind the light assembly is a trim panel. Carefully pry the trim panel back so you can see where the assembly is mounted. Next, remove the 10mm nuts holding the assembly. Finally, the assembly has a clip holding the furthest section of it on the fender. Carefully wiggle the assembly to remove the clip. Note: The assembly is plastic and can break easily, so be careful.