Right brake light works intermittently

Hi,

Most times it is the socket itself. Remove bulbs and inspect for corrosion or pushed in connection points.

As far as the wiring schematic, I attached the entire exterior lighting schematic below. I had to cut the pics in half to make them readable. In pic 3, I highlighted the brake light on the right side.

Here is a link you may find helpful:

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

Also, check the ground for that light. It could be corroded or loose. See pic 3 for location.

Let me know what you find or if you have other questions.

Take care and God Bless,

Joe