That happened to me as well. I thought it was a fuse too, but it was actually the curcit board that the lights are on. When the trucks go down the assembly line it is easier for them to use a curcit board on the cars now, it makes the vehicles go down the line fast...but that also means that its all electrical which also means that it will short faster. Before you freak out about it being a wiring problem, check out getting a curcit board for the rear. Plus it only cost like 15 bucks. And it's a quick fix. When you do this, I would replace all the lights as well to make sure that none of the other bulbs go bad that way you keep all the bulbs up to date.