Right rear brake light and turn signal do not work

Welcome to 2CarPros.

First, confirm the bulb is the correct replacement. This will require a dual element bulb.

Next, I attached a pic below from the wiring schematic. I need you to check for power to the orange/light blue wire that goes to the socket. Also, check for continuity to ground on the black wire.

Here are a few links you may find helpful when testing:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

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

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When testing, make sure the light socket isn't corroded or damaged where the bulb goes. Make sure the pins that make contact to the bulb are not bent or damaged in any way.

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

Joe