Brake and tail lights not working

I assume you changed the bulbs today to try and fix this and it did not fix it or are they not working after you changed the bulbs?

If this is the only side that is not working, I suspect we have an issue with the ground wire as the other signal wiring for these lights is shared wiring for the other side. So if the other side is working then we know the control and fuse is working. This means it is a ground or wiring to the light assembly.

Does the turn signal still work on this side? If it does then the ground should be ok as well.

This means we need to either trace wiring to try and find the short or just run a new wire from where you do have power on the other side.

https://www.2carpros.com/articles/how-to-check-wiring

Let me know this info and we can go from there as that will help determine the best course of action. Thanks