How to Fix Radio Interference from LED Lights?

LED lights are an attractive feature add to your vehicle. They are brighter and longer-lasting than traditional lights but are cost-effective. But it is common for people to experience radio interference in their cars after installing these LED lights.

LED lights operate by a sequence of modulated energy. This determines the number of times the lights will flicker every second.

The electrical signals from the lights hinder the ability to receive AM/FM radio frequencies in vehicles. Other LED lights in the vicinity can also contribute to this issue. However, it is a common problem and can be fixed easily.

Radio Interference from LED Lights

Using an AM Radio

You can use an AM radio wave to identify the source of the interference. The radio simply needs to be functional with full batteries.

  • Select the radio station at the lower end of the dial.
  • Make sure the selected station does not produce any sounds. Pick a station that doesn’t even create any static.
  • Now get the radio in close proximity to the probable causes of interference.
  • Check each LED light. Even headlights and door lights should be checked.

It should be noted that there might be numerous sources of radio interference in a vehicle. It is possible that the interference you are facing is not caused by LED lights.

Changing the LED Lights

The prime culprit of radio interference is cheap LED lights. Low-quality LED lights radiate specific frequencies that get merged with the radio waves. Because of this, radio signals cant be appropriately interpreted.

The issue mentioned can be avoided by switching to high-quality LED lights. Though they are expensive, they will prove to be an excellent solution to this problem. In addition, LED lights from reputable companies are equipped with EMI suppression modulators. Because of that, these lights don’t tamper with the radio signals.

Changing the Transformers

Transformers can also emit electromagnetic radiation, which can impede radio signals. This is why you should consider replacing the transformers of the LED lights.

Using EMI-resistant transformers can alleviate this issue. It should be kept in mind that some LED lights have built-in transformers. This means you cannot change the transformers separately. In this case, you have to replace the entire LED light system. This method only works for low-voltage LED lights as lights with higher voltage do not contain replaceable transformers.

Applying Ferrite Cores

Ferrite cores serve as an EMI filter. You can wrap the ferrite cores around the wiring to reduce radio interference. But you have to do it individually on the wires depending on the number of the lights. These EMI filters reduce electrical frequencies.

Ferrite cores become necessary when you are using cheap LED lights. Installing ferrite cores could require help from professionals. They are also commonly known as ferrite chokes and are generally sold online.

Using Different Wiring

The wiring plays a very subtle role when it comes to radio interferences. It is a proven fact that longer wires are more likely to tamper with radio signals. So you should try using shorter wires. Insulated wires can also be useful in this regard.

Final Words

Radio interference can come from various sources. LED lights are an attractive means of lighting, but using the wrong ones can ruin your listening experience. Luckily this can be fixed easily. Troubleshooting is often seen as a daunting task, but it is worth the effort.

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