when I apply break break lights stay on what could be the case of this ?? its in a 86 ranger any help would be great

It's not the fuse that causes the draw. If you remove the fuse, it just breaks the connection stopping the draw from occurring. It may be the break switch that is under the dash on the very top of your break peddle. I'm guessing it's sticking and causing your brake lights to stay on. Or if your vehicle has a tail light relay, the relay may be bad. I would first change out the relay if you have one. If problem persists, I would then change out the brake peddle switch. Here are some pics.