I got a 2000 Honda Accord EX V6. The corner brake lights stopped working recently for some unknown reason. The brake light in the rear spoiler is the only one that works. I checked all the fuses and replaced all the bulbs. but the problem remains. The other lights, headlights, turn signals, hazard lights, etc work just fine. The "brake light" warning light in the dash panel is off. I checked all the cables around the lights and nothing is lose or unplugged.

Other than the brake lights not working, the car is running fine. Any ideas what could be causing the corner brake lights not to work?