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There are two or more faults at work here depending on the car.

If your car has a relay that runs brake lights or Tail lights one or both could be bad.


If your car has these items controlled by a body control module it could be bad or with this system the computer grounds the bulbs to make them work and damage to the wires anywhere in the car can cause this.


You have a brake light switch that keeps the brake lights on all the time AND a bad ground in the system so the Brake lights ground through the tail lights. This kind of thing is more common on per 2000 model year vehicles.

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Q: Why would rear parking and brake lights stay on when the car is shut off?
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