Tail light wiring?

Not on that car. The tail lights have a different power feed, the only part they share is the headlight switch itself.

Here is a guide to help you check the wiring with the headlight and tail light wiring diagrams so you can see how the system works:

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

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.