Why Is The Rear Brake Light Not Working On My Motorcycle?

If you’ve noticed that your motorcycle’s rear brake light isn’t working, you’re not alone. Many riders encounter this issue at some point in their biking journey.

While it can be frustrating, it’s essential to address this problem promptly for your safety and compliance with traffic laws.

In this article, we’ll explore the common reasons why your rear brake light might not be functioning and provide you with some tips on how to troubleshoot and fix the issue.

5 Reasons Why Rear Break Light Is Not Working On Your Motorcycle

1. Burned-Out Bulb

The most common reason for a non-functional rear brake light on a motorcycle is a burned-out bulb. Over time, the filament inside the bulb can break, causing it to stop emitting light.

To check if this is the issue, follow these steps:

  • Park your motorcycle in a well-lit area.
  • Turn off the ignition and remove the key.
  • Locate the rear brake light bulb, usually positioned inside the tail light assembly.
  • Carefully remove the bulb by twisting it counterclockwise (if it’s a twist-in bulb) or by unclipping it (if it’s a push-in type).
  • Inspect the bulb for any visible signs of a broken filament, such as a darkened or disconnected wire.
  • If you see damage, replace the bulb with a new one, making sure it’s the correct type for your motorcycle.

2. Faulty Brake Switch

The brake light is activated when you apply the brakes, thanks to a brake switch that senses the pressure on your brake pedal or lever. If this switch is faulty, it won’t send the signal to illuminate the brake light. To check for a faulty brake switch:

  • Locate the brake switch, which is usually located near the brake pedal or lever.
  • Examine the switch for any visible damage or loose wiring.
  • Test the switch by gently pressing the brake lever or pedal while observing the brake light. If there’s no response, the switch may need replacement.

3. Wiring Issues

Damaged or corroded wiring can disrupt the flow of electricity to your motorcycle’s brake light.

Inspect the wiring for any exposed wires, frayed connections, or signs of corrosion. If you find any issues, repair or replace the damaged wiring as necessary. Also, ensure that all connections are secure.

4. Fuse Problems

Motorcycles have electrical systems protected by fuses. A blown brake light fuse can cause your rear brake light to stop working.

Check your motorcycle’s fuse box to locate the brake light fuse and visually inspect it. If the fuse is blown, replace it with a new one of the same amperage.

5. Faulty Tail Light Assembly

In some cases, the issue may be with the tail light assembly itself. If there’s a problem with the circuitry or connectors inside the assembly, it can prevent the brake light from functioning correctly. Inspect the tail light assembly for any visible damage or loose connections. If necessary, replace the entire assembly.


A non-functional rear brake light on your motorcycle is not only a safety concern but also a potential legal issue. Regularly checking and maintaining your brake light can help prevent this problem from occurring.

If you do encounter a rear brake light issue, follow the troubleshooting steps mentioned above to identify and resolve the problem.

Remember that safety should always be your top priority when riding, and ensuring your brake light works is a crucial part of staying safe on the road.

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