1 of 3 reasons why, your head lights are on, your reflector lights are on ,or your brake sensor is broken
Defective brake light switch, or it is out of adjustment. Located on the brake pedal arm. there is a recall on the brake lite switch , check your local dealer..
Brake lights remaining on in a 2003 Megane 1.4 can be an indication that there may be a bad fuse, a wiring issue, or a bad switch. Through the use of a multimeter you can troubleshoot the issue.
The tail lights on a Toyota Camry may stay on too bright if the brake sensor is stuck or the bulb is receiving too much power. A multimeter can be used to check the output of the socket.
Probably a brake light switch.
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Brake lights could stay on in a 1999 Dodge Stratus because of a short in the wiring. If the headlamps are off and the brake lights are still on, check the wiring for the brake lights that is inside the trunk. Sometimes cargo in the trunk can interfere with the lights.
If the brake lights stay on that probably means the switch on the brake pedal that activates them is defective.
check the brake light switch
Bad brake switch
The brake relay switch is bad.
Adjust the brake switch which is above the brake pedal.
the brake lights are on a separate cuircut,if your brake lights are staying then it will be a fault with the brake light switch. the switch is located under dash,and will be on or very close to brake pedal.