Look at the upper end of the brake pedal under the dash area
the brake light switch is mounted above the brake pedal on the metal lever
Defective or out of adjustment brake light switch.
check brake light fuse and brake light switch on pedal
Could be, a blown fuse, burned out bulbs, bad brake light switch, or an improperly installed brake light switch.
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check brake light switch on brake pedal maybe getting bad
Could be bad brakelight switch or blown fuse
where is brake light switch
Usually located at the upper end of the brake pedal under dash area
I have the same problem - but my third brake light slightly flashes when the car is of (Explorer 1998). I have replaced the "stop light" switch with no improvement at all.
It could be a bad brake light switch. You have to step on the brake to shift it out of park.
check the brake light switch it might be sticking. located under the dash connected to the brake pedal