Mastering Top Brake Light Diagnostics Find and Fix the Culprit

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. This could either be in the parking lights or in the rear tail light bulbs. Try turning on just the parking lights. If the brake lights come on, ... the brake light switch is on the firewall under the hood at the rear valve cover.. It is ''Hot'' all the time, key on or off.. or on the treadle ... Adjusting the brake switch seemed to solve my problem. Underneath the dash you can try to adjust the brake switch on the brake petal. Press on ... If it doesn't work, then I believe the brake light switch you've already checked is at fault. ... And to clarify, my cruise would still work but ... 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? The cause of this, they said, was that the LED bulbs had an improper resistance level in comparison to the stock incandescent 3157 bulb. ... #cars #carguy #diy #mechanic #fix #cargirl #auto This killed my battery : ... Brake light stay on? Replacing brake switch stopper rubber for Kia ... First thing to check is the brake light modulator, it's not a factory part and may have shorted internally, or maybe a problem with it's wiring. The next thing they need to check is the harness to the rear lighting. My guess is that another wire is shorting against the 3rd brake giving it ...