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the switch needs to be adjusted
What are the bracket in the back seat of 2003 Hyundai Accent for?
brake lamp switch failure
From: http://www.2carpros.com/makes/hyundai.htm Answer: It sounds as if the brake light switch needs to be adjusted. It is located on the brake pedal leakage up under the dash.
The 2000 Hyundai Excel indicator light and brake light might stop working all of a sudden because of a burned out bulb. Check all bulbs on the brake lights and turn signals. This problem could also be caused by a blown fuse or a blown flasher fuse.
Brake light switch, goto your Hyundai dealership, buy the part for $15 and install it
Chjeck the brake light switch located somewhere on the brake pedal lever.
where is brake light switch
if you 3rd brake light still works it is most likely a fuse. If none of your lights work usually it is the brake light switch located on the top of the brake pedal. Although there could be some odd wiring issue. Chances are it is the switch.
Defective or misaligned stop light switch? Usually located at the upper end of brake pedal under dash area
it would be the brake light switch about 20 dollars at autozone
How to change third brake light in 2009 Hyundai sonata