Unveiling the Top Brake Light Anomaly A Comprehensive Analysis

Normal brake lights activate when brake pedal is depressed. I also have a rear windshield wiper that runs constantly, and I unplugged it. I've " ... The main brake lights are always on when my headlights are on. Not the third brake light on the cab, just the two tail light portions. A bad stop lamp switch can cause this. Save Share. You may have replaced one of the tail light bulbs with the wrong one. It may be shorting two circuits together. So the brake light stays on. probably something with the brake light switch on the brake pedal. try pulling up on the brake pedal and if the lights go off, then you can ... Usually, it's the brake light switch. It has a little stopper on it that tends to break and fall off. Look at your floor, can you find it? The cause of this, they said, was that the LED bulbs had an improper resistance level in comparison to the stock incandescent 3157 bulb. Also check the brake fluid level see if it is too low. I remember too low brake fluid level will also turn the warning light on. Top ... Which means that the LED's should all be off if the brake is not applied. Have you made any other modifications in the rear lighting circuit? So conclusion of my problem above. The whole thing is caused by the printed circuit board inside the light fixture on the left side brake light.