The brake light attatched to the hatch of my 92 firebird isn't working. I pulled it apart and put in a new bulb and still nothing. What is possibly wrong with it?

I plan on running a test light to it tomorrow, I just hate working with small screws in the back of my car >.< if there is no current what should I do from there? Is it possible a fuse is missing for it, or maybe the wires are shot/disconnected from somewhere?

On a side note, the electric locks on the car barely work on the drivers side, and not at all on the passengers side. And for some reason my brights are hard to turn on, and even harder to turn off. If you could give me any ideas about the matter let me know ^^