1. Brake Light Switch: The brake light switch is a common culprit when both brake lights stop working at the same time. This switch is located under the brake pedal and activates the brake lights when the pedal is depressed. If the switch is faulty or not properly adjusted, it can cause the brake lights to not come on.
2. Ground Connection: Both the brake lights share a common ground connection. So, if the ground wire is not making a good connection, then both brake lights could be out. Ensure the ground connection for the brake lights is secure and free of corrosion.
3. Brake Light Relay: Some vehicles use a brake light relay to control the power to the brake lights. If the relay fails, it can prevent the brake lights from coming on. Check the brake light relay to ensure it is functioning properly.
4. Worn-Out Bulb Sockets: If the bulb sockets for the brake lights are worn out or corroded, they may not be making good contact with the bulbs, preventing the bulbs from receiving power. Check the bulb sockets for any signs of damage or corrosion and replace them if necessary.
5. Damaged Wiring: The wiring for the brake lights could be damaged, preventing power from reaching the bulbs. Check the wiring harness for any visible damage or wear and repair or replace any damaged wiring as needed.
If you have checked all of the above items and the brake lights still do not work, it is recommended to take the vehicle to a professional mechanic for further diagnosis and repair.
