Top Brake Light Conundrum Diagnosis and Remediation

Googling reveals how common this problem is across the entire motor vehicle range. It can be the switch (brake pedal) third light connector(s) ... Also check the switch pad, it's a dime sized rubber spot that clicks into a hole in the pedal arm tab. The hole the pad mounts to is just ... The cause of this, they said, was that the LED bulbs had an improper resistance level in comparison to the stock incandescent 3157 bulb. The third brake light is on all the time, even after the XC is turned off. I have the check stop lamp message in the display. Any suggestions. 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 ... A bad stop lamp switch can cause this. Save Share. If this is happening with the vehicle off and sitting, this can potentially kill the battery as well. I would recommend checkin the brake light ... I went back and checked front and back brake again. Turned out the back brake was getting very slightly stuck, just enough to keep the light on. Background: My third brake light molding brackets have been broken for several years due to being opened with ice frozen on the top molding/roof ... A common issue on Hyundai cars that can cause the brake lights to stay on is the rubber switch stopper gets brittle and falls off.