The most probable cause is that the brake light switch is out of adjustment.
Shorted wire to ground or failed brake switch.
The part of the car that turns on the brake lights when you apply pressure to the brake pedal is called the brake switch. Releasing pressure from the pedal causes the brake switch to break its electrical contact, turning off the lights.
TRY TURNING THE EMERGENCY FLASHERS ON AND OFF A COUPLE TIMES THEN CHECK YOUR BRAKE LIGHTS. WORKED FOR ME.
The flasher unit for the indicators. Pressing and releasing the foot brake for the brake lights. Turning the light switch on and of for the others. If it is not any of these then there is an electrical fault, possibly a loose connection.
Check switch under pedal & make sure is turning off when not applied.
the brake switch at the pedal is stuck or out of adjustment.
If your question is "What would I conserve by turning off lights and fans?", the answer is electricity.
Brake Lights that Will Not Turn OffAlthough it's possible there could be other reasons, the most common causes for brake lights to stay on continuously include:The brake light [if mounting position is adjustable] is out of adjustment, orThe brake light switch contacts are fused ["welded"/melted] together, orThe brake light switch is otherwise defective.
Is it the taillights or the brake lights? If taillights it may be a wiring problem, If brake lights check the switch on the brake pedal
The brake lights won't turn off because the brake light switch on the pedestal of the brake pedal needs to be replaced.
first check the ground wire on the tail lights make sure it has a good ground. if that does not work then its a short somewhere in the car. ANSWER Your brake light switch could also be faulty and that could trigger your brake lights from turning on while your engine is off and all other lights off as well.
Turn up the lights Turn off the the lights Turn me on Turning me off Turning me on