Brake lights wont turn on?

Welcome to he forum, if the high-mount brake lite doesn't work, check the brake light fuse #2 in the fuse panel on the right side of the dash this guide will help

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If the fuse is okay I would replace the brake light switch which I have included in the images below, also go over this guide as well.

https://www.2carpros.com/articles/brake-lights-not-working

Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car.

https://www.2carpros.com/articles/how-to-replace-a-brake-light-switch

Here is the brake light wiring diagrams so you can see how the system works. Check out the images (Below). Please let us know how it goes