1990 Nissan hardbody brake lights stuck on?
I would check the brake regulator switch, located under the dash near the top of the brake pedal. Its a silver piece that has a button like switch that activates every time you press on the brake pedal causing the light to turn on. It could be stuck in, causing the brake light to stay on.
What if your brake lights are stuck on can you unplug 1 side of your battery on a 94 mercury villager?
1: check the switch that the brake pedal opens and closes when you (respectively) release and apply the brake. using a voltmeter, verify that no voltage passes when the switch is open (brakes unapplied) - if there is continuity when there should not be, then the switch is the problem. you will have to be more specific beyond "stuck" if this does not help you.