Just purchased a 87 Bronco a few weeks ago and was told that the rear brakes stuck but were fixed now. Well apparently not because my first trip out to the desert the passenger side rear locked up on me on my way home. So i took the drum off and took the adjuster off and made it home. What could be causing it to do this. I also wasn't using the brakes often when it happened. Any help would be greatly apprecciated.