Troubleshooting The Mitsubishi Outlander Brake Light Fail

By Nick Marchenko, PhD

In the spirit of advocating for safer and more reliable automobiles, this guide is dedicated to assisting Mitsubishi Outlander owners in diagnosing and fixing common issues related to brake light failures. This comprehensive approach combines insights from multiple real-life scenarios to empower you to address these issues effectively, potentially saving you time and money.

Understanding the Problem

Brake light issues in the Mitsubishi Outlander can manifest in several ways, such as one brake light not working while the other does, or both failing to illuminate. These problems might stem from various sources including bulb failures, electrical system malfunctions, or even more obscure issues related to the vehicle's wiring system.

Step 1: Check the Bulb

The most common and simplest cause of brake light failure is a burnt-out bulb. In some cases, a double filament bulb might partially function, meaning the running light works but the brake light does not. Here’s how to check and replace it:

• Access the Brake Light Assembly: Open the tailgate and locate the brake light assembly on the affected side.
• Remove the Assembly: Depending on your Outlander's model year, you may need to unscrew or unclip the assembly from the vehicle.
• Inspect the Bulb: Look for signs of damage or a broken filament. Remember, double filament bulbs can fail in one function while still performing the other.
• Replace the Bulb: If the bulb is faulty, replace it with a new one that matches the original specifications.

If you are not sure what bulb sizes are used in your Mitsubishi Outlander - check out bulb size chart to find the answer:

• 2015;
• 2014;
• 2013;
• 2012;
• 2011;
• 2010;
• 2009;
• 2008;
• 2007;
• 2006;
• 2005;

Step 2: Inspect the Brake Light Switch

A faulty brake light switch can also cause brake light issues. This switch activates the brake lights when you press the brake pedal.

• Locate the Switch: It's usually found at the top of the brake pedal.
• Check the Rubber Grommet: Ensure it hasn't come out. If missing, replace it or temporarily fix it with a suitable substitute to ensure the pedal activates the switch.
• Test the Switch: Use a voltmeter to check if the switch is operational. If faulty, replace it.

Step 3: Review the Electrical System

• Fuse and Wiring: Confirm that the fuse for the brake lights (often labeled 'STOP' in the fuse box) is intact. Even if one light works, a shared circuit issue could cause the other to fail.
• Brake Fluid Level: While not directly related to the brake lights, ensuring the brake fluid is at the proper level is a good practice, as some vehicles have sensors that might indirectly affect the electrical system.

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Step 4: Address Uncommon Electrical Issues

In some Outlander models, seemingly unrelated electrical components can affect brake light functionality. For instance, non-functioning LED license plate lights or even a glove compartment light might cause a brake light not to work due to Mitsubishi's unique wiring practices. Replacing these can unexpectedly resolve brake light issues.

• Replace LED License Plate Lights: If one brake light fails, check and replace these as needed.
• Check the Glove Compartment Light: Though it sounds unusual, some owners have reported this as a solution for specific lighting issues.

Final Thoughts

While the design choices in the Mitsubishi Outlander's electrical system might seem unconventional, understanding these quirks can save you from unnecessary dealership visits. By following this guide, you can diagnose and fix brake light issues in a practical and efficient manner, embodying the principle that every driver has the right to a reliable and safe vehicle. Always remember, when in doubt, consult with a professional mechanic to ensure the safety and functionality of your vehicle's lighting system.

See Also:

• What do you need to do when a Mitsubishi Outlander won't start but just turns over?
• What Does P0161 Mitsubishi Outlander Mean
• Discover the Magnificence: An All-Inclusive Guide to Preserving the Paint of Your Mitsubishi Outlander

Nick Marchenko, PhD

Industrial Engineer & Automotive Content Specialist

Nick writes in-depth guides on car clubs, engine specs, vehicle ownership, and modifications, combining engineering knowledge with automotive passion.

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