92 Sidekick; Brake Warning Light Stays On

Hi;
I have had this vehicle for nearly 8 months now, and just recently (within the week) I noticed that the Parking Brake light stays on even when the brake is not on! Now- when I put the brake off, the headlights turn off (of course) but like I said, the warning light stays on.
I'm not sure if this is a sign of some /other/ warning, seeing as I have a decent leak in my power steering system *somewhere* that seemed to get about twice as bad right before this light went on.

When I apply pressure to the brakes, they are just as firm as they have always been, and there is no discoloration/leak nor is there any debris in the reservoir.

I am at a bit of a loss here. I'm hoping this is just something simple and not "lethal" to both my vehicle and my wallet.

Note: I was recently working on my stereo and I blew the fuse. I then proceeded to pull a fuse from somewhere else in the box (the RWAL spot -- I figured it had something to do with "Rear Window" something-or-other, not "Rear Wheel AntiLock")
Would that have anything to do with it? I had already replaced the fuse as soon as I pulled it, seeing as it is a 25A fuse (and the fuse is still good), but the light is now on and I have no clue if that's from what happened with the fuse.

On a side note, where is a good place to pull power from for a CB radio? I'm thinking the lighter (seeing as I don't use the actual cigarette lighter), but is there somewhere better?

Thanks