Tools you might need:
* Phillips head screwdriver (possibly a Torx driver, depending on your model)
* Possibly a trim removal tool (plastic pry tool) to avoid scratching the interior trim.
Steps:
1. Safety First: Park your Mustang on a level surface, engage the parking brake, and turn off the engine. Consider wearing safety glasses.
2. Interior Access: Open the rear hatch (trunk). You'll need access to the inside of the rear hatch area above the rear window.
3. Remove Interior Trim: The third brake light is usually accessed from the inside of the vehicle. There will likely be a panel or trim piece covering the access to the light. This panel may be held in place with clips or screws. Carefully pry it loose using your trim tool (if necessary) or screwdriver, being gentle to avoid damage. There might be a few screws securing the interior trim.
4. Disconnect Electrical Connector: Once the trim is removed, you'll see the electrical connector for the brake light. Carefully disconnect it by gently squeezing the release tabs on the connector.
5. Remove the Brake Light Assembly: Depending on the model, there may be a few screws or clips holding the brake light assembly in place. Remove these fasteners. Gently pull the light assembly away from the hatch.
6. Replace the Bulb (or Assembly): Examine the old brake light. Some models use a single bulb, while others may have an entire assembly that needs replacing. If it's a bulb, carefully remove the old one and install the new one, ensuring it's properly seated. If it's the entire assembly, simply install the new assembly in the reverse order of removal.
7. Reconnect Electrical Connector: Reconnect the electrical connector securely.
8. Reinstall the Trim Panel: Carefully put the trim panel back in place, securing it with screws or clips.
9. Test the Brake Light: Close the hatch and test the brake light to ensure it's working correctly. Have someone press the brake pedal while you observe the light.
Important Considerations:
* Bulb Type: Before starting, determine the correct bulb type for your 2006 Mustang. The owner's manual should specify this. Purchase a replacement bulb from a reputable auto parts store.
* Assembly Replacement: If the entire brake light assembly is damaged or cracked, you'll need to purchase a replacement assembly.
* Wiring: Be careful not to damage any wiring during the process.
* Difficulty: The exact process might vary slightly depending on the specific trim level of your Mustang. Always refer to your owner's manual for model-specific instructions. If you are uncomfortable with any of these steps, take it to a qualified mechanic.
Remember, this is a general guide. Always consult your owner's manual for detailed and accurate instructions specific to your 2006 Ford Mustang. Improperly installing the light could lead to safety hazards.