How To Fix The Common Issue of LED Turn Signals Not Flashing With Headlights On

If you have ever been out on the road and noticed that your LED turn signal lights are not flashing when you have your headlights on, then you’re not alone. This is a common issue for many vehicles. We will provide a step-by-step guide on how to troubleshoot and fix the issue of LED turn signals not flashing when the headlights are on. We will also explain the theory behind why this issue occurs, as well as provide tips for how to prevent it from happening in the future.

By the end of this article, you should have a better understanding of how to address this common issue and have the knowledge and resources to fix it yourself. 

What’s a LED turn signal?

LED turn signals are becoming increasingly popular in cars and trucks, as they are brighter and more energy efficient than traditional incandescent bulbs. However, many drivers have experienced an issue with their LED turn signals not flashing when the headlights are on. 

LED turn signals work by using a light-emitting diode (LED) which is a semiconductor device that emits visible light when an electric current passes through it. The LED lights are integrated into the car’s lights and are typically used to indicate when a vehicle is turning or changing lanes. 

Do LED turn signals flash with headlights on?

When the headlights are on, the LED turn signals will not flash as they are illuminated by the headlights and, therefore, cannot be seen as a signal. 

If the headlights are on and the turn signal LEDs are not flashing, the culprit may be the turn signal flasher. The flasher is responsible for controlling the turn signal speed and would need to be replaced if the issue is still unresolved. To check that the flasher is indeed the issue, try turning the headlights off and see if the LED turn signals flash normally. If they do, then you have found the problem. 

Reasons why LED turn signals won’t flash with headlights on

One of the most common issues with LED turn signals is they won’t flash when the headlights are on. This issue is usually caused by a few different reasons, so it’s important to understand why it’s happening and how to fix it. Here are the top three reasons why LED turn signals may not flash with headlights on aside from the headlight illuminating the LED signal;

1. Poor electrical connection: 

Poor electrical connections are one of the leading causes of LED turn signals not flashing with headlights on. Make sure all of your wires and connections are properly connected and secured.

2. Low voltage:

 An LED turn signal requires a certain voltage to operate correctly. If the voltage is too low, the turn signals won’t flash. Make sure the voltage supply is adequate. 

3. Faulty wiring: 

Faulty wiring can also cause LED turn signals to not flash with headlights on. Make sure all of the wires are in good condition and properly connected.

How to fix a LED turn signal not flashing with headlights on 

One of the most common issues with LED turn signals is that they won’t flash when the headlights are on. This can be an annoying problem, but luckily it’s also an easy one to fix. Here’s what you need to do to get your LED turn signals up and running again when the headlights are on:

• Make sure the wires are connected to the turn signal correctly.
• Check the wiring for any loose connections.
• Make sure the LED turn signal is compatible with your vehicle’s electrical system.
• Replace any faulty wiring or components. 

If the LED turn signal still does not flash with the headlights on, it could be a sign of a larger wiring issue. In this case, it is best to consult a professional auto mechanic in order to determine the exact problem. They can diagnose the issue, and provide a solution to make sure that the LED turn signals will flash with the headlights on in the future. 

Conclusion 

LED turn signals not flashing when headlights are on is a common issue. However, this issue is not difficult to fix if the LED signal has previous issues. By understanding how the flasher relay works and how to properly test for power and continuity, you can quickly identify and address the issue. With the right tools, knowledge, and a bit of patience, you should be able to get your LED turn signals flashing properly in no time.