The problem just happened out of the blue, if you manually push the break pedal forward the lights will go off but otherwise the brake lights are continually on.
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1997 Volkswagen Jetta Question: Brake Lights won't turn off
Answer #1torque wrench from Stewart's Auto Repair LLC, March 21, 2011, 18:33Master
The brake switch that is mounted to the pedal is to close to the pedal arm. You will need to adjust it further away from the pedal. The switch is threaded and you just need to unscrew it until it works properly.