Why are my brake lights not turning on?

Hello,

This issue could be due to a faulty brake light switch.
The brake light switch is located behind the brake pedal and when the brake gets depressed the switch gets pushed, which triggers the brake light.
A malfunctioning switch will prevent any of the brake lights from coming on.

https://youtu.be/RBCDVfzNQGk

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.