Hi and thanks for using 2CarPros.com.
The first thing I need you to do is check for power to the socket. You will need a test light. Here are general directions for using a test light as well as how to test wiring:
If there is power to the light socket, either the socket is bad or there is a grounding issue.
I have attached a schematic for your vehicle. There will be three wires at the socket. One will be green/white, one will be red/black, and one black. The one that is all black is the ground. The red/black is the power supply to the light. It should have 12 volts when you press the brake. The green/white will also take power to the third brake light, so it should also show power. If you get power to the red/black wire, check and confirm the ground is good by checking continuity. You will need a multi meter for that. It basically checks to see if there is a completed ground connection between the black wire and the car's body.
Take a look at the schematic to locate ground locations. I realize you indicated little knowledge. Do not be intimidated with this process. It is not as hard as it appears.
Do this first and let me know if you need help, have questions, or need additional information.
Saturday, October 31st, 2020 AT 10:44 AM