I have a 1996 jeep grand cherokee and the brake lights won't come on. The taillights work fine. I have switched the stop switch and checked the fuse for the stop switch. What else should I try? On a side note one of the brake/taillight plugs needs replaced. Could this be the issue. It isn't affecting the other taillights just the other stop lights if it is.

If your brake light goes out when your headlights are on here is your fix:
1. remove taillight assembly (two screws hold it in place
2. Remove light bulb and socket from assembly (this will be the top bulb) put it to the side
3. Inside this hole on the rim you will see three silver metal contacts, two side by side and one by itself.
4. With a small screwdriver or a small pointed tool, gently pry up the contact which is by itself, all you are wanting to do is bend it upwards slightly.
Over the course of time this conact succumbs to the heat of the bulb and settles into the plastic. All you are doing now is making a better contact between the metal and the bulb.
This will fix your problem, it did mine and will save $200+ from a dealer.
GOOD FIXIN!