All of the rear lights are not working

Hello,

It sounds like you have a tail light relay (flasher) that is not working. To be sure here is a guide to help you and the running light wiring diagrams so you can see how the system works and the relay location as well. There is also a fusible at the battery I would check.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.