Brake Lights Don't Work!

I have a 2004 Honda Accord Coupe Ex 4clyn. When I use the brakes, my brake lights do not light up, except for the high mounted center brake light in the rear window. But when I press the hazard lights button, they work fine then. What could be the problem? It’s not the bulbs or fuses.

Check the turn signal flasher unit. The brake circuit runs through it.