Nissan GT-R Brake Lights Are Not Working - Where Is The Problem?

By Nick Marchenko, PhD

Ensuring the safety and operational integrity of our vehicles isn't just a matter of responsibility—it's a fundamental right of every driver. In the vein of advocating for consumer safety and the empowerment of vehicle owners, this guide aims to arm Nissan GT-R enthusiasts with the knowledge needed to diagnose and remedy brake light failures on their own. Drawing from a wealth of shared experiences and solutions within the automotive community, this compilation seeks to simplify what might initially appear as complex problems. Whether you're facing an issue with a fuse, an LED light, or wiring, this guide endeavors to provide a clear path to resolution. Let's roll up our sleeves and delve into the systematic troubleshooting and fixing of brake light issues, ensuring our cherished GT-Rs remain safe and visible on the road.

Preliminary Checks

Before diving into the troubleshooting process, it's crucial to perform some basic checks:

• Inspect all brake lights to see if the issue is isolated to one side or affects all brake lights.
• Test the hazard lights to confirm if the issue is exclusive to the brake light function.
• Check for any visible signs of damage to the wiring, especially around areas that get hot or are prone to wear.

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• 2019;
• 2018;
• 2017;
• 2016;
• 2015;
• 2014;
• 2013;
• 2012;
• 2011;
• 2010;
• 2009;

Common Causes and Fixes

Blown Fuses

A recurrent theme in brake light failure is the blowing of fuses. The Nissan GT-R has multiple fuse boxes, and it's essential to check them all:

• Start with the interior fuse box located by the driver's feet. Look for a "stoplight" 10 amp fuse and inspect it for damage.
• Check the engine bay fuse panel next to the battery. This panel may contain fuses related to the brake lights that are not immediately obvious. Pay special attention to fuses labeled "tail/stop."
• If a fuse is blown, replace it with one of the same amperage. Never use a higher amperage fuse as a permanent solution, as this can cause more severe electrical issues.

LED Issues

Upgrading to LED lights or experiencing failures with existing LEDs can lead to complications:

• LED malfunction can cause a short, leading to blown fuses. If an LED bulb, especially in the license plate light, is flickering or blown, replace it with a new one or revert to the stock bulb.
• After replacing LED bulbs, if problems persist, check the wiring for any signs of damage or shorts, particularly if aftermarket modifications were made.

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Wiring and Short Circuits

A more insidious cause of brake light failure can be wiring issues or short circuits:

• Inspect the wiring to the brake lights, including the third "high" brake light. Look for any signs of melted insulation or wires that may have fused together.
• Check the trunk release power harness, as it might share wiring with the brake lights. Damage here could affect multiple systems.

Specific Fixes Based on Reported Issues

• Fuse Replacement: Always replace blown fuses with ones of the correct amperage. Using a higher amperage fuse can solve the issue temporarily but may cause more significant problems down the line.
• LED License Plate Lights: If LED license plate lights are causing issues, try removing them and see if that resolves the fuse blowing. Replace with OEM bulbs if necessary.
• Check Hazard Lights: If brake lights are not working but hazard lights are, this can indicate a specific issue with the brake light wiring or a less common fuse problem.
• Third Brake Light Wiring: In cases where wiring to the third brake light has melted or shorted, it's crucial to repair or replace the harness to prevent further electrical issues.

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DIY Steps to Resolve Brake Light Issues

• Identify the Problem: Use the symptoms and preliminary checks to narrow down the potential cause of the brake light failure.
• Fuse Inspection and Replacement: Check all relevant fuses and replace any that are blown with the correct amperage fuse.
• LED and Bulb Check: Inspect and replace any faulty LED or standard bulbs.
• Wiring Inspection: Carefully inspect all related wiring for signs of damage, wear, or melting. Pay special attention to areas that have experienced heat.
• Consult the Manual: Refer to the Nissan GT-R manual for detailed diagrams and fuse box locations to assist in troubleshooting.
• Test After Each Step: After addressing a potential cause, test the brake lights to see if the issue is resolved.

Final Thoughts

Vehicle maintenance and troubleshooting can often seem daunting. However, by approaching the problem systematically and understanding common causes, many issues can be resolved with a bit of DIY spirit. Remember, safety is paramount, not just for you but for everyone on the road. Regular checks and maintenance can prevent many of these issues from becoming serious problems. Stay safe, and happy troubleshooting!

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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