10 Reasons Why Your LED Headlights Only Work on High Beam

LED headlights have become increasingly popular due to their brightness, longevity, and energy efficiency. However, experiencing a problem where your LED headlights only work on high beam can be frustrating and dangerous. Driving with a high beam can blind other drivers and lead to accidents. In this article, we’ll discuss possible causes and solutions to help you address this issue and ensure that your LED headlights are working correctly.

What Causes LED Headlights to Only Work on High Beam?

1. Incorrect Bulb Type

Using the wrong bulb type in your headlight can cause it to work only on a high beam. Ensure that the bulb you are using is compatible with your vehicle’s make and model. Also, check the voltage requirements of the bulb.

2. Faulty Low Beam Circuit

A faulty low-beam circuit in your headlight can cause it to work only on high beam. This is usually due to a damaged or worn-out low-beam circuit. Have a technician check your vehicle’s electrical system to identify and fix the issue.

3. Loose Connection

A loose connection between your vehicle’s electrical system and the headlight can cause it to work only on a high beam. Check the connections and tighten any loose ones to restore normal headlight function.

4. Dirty or Foggy Lens

A dirty or foggy lens can reduce the effectiveness of your headlight and cause it to work only on high beams. Clean the lens regularly to maintain optimal headlight function.

5. Faulty Headlight Relay

The headlight relay controls the power supply to the headlight system. If it is faulty, your headlights may only work on high beams. Have a technician check the relay and replace it if necessary.

6. Bad Alternator

A bad alternator can cause your vehicle’s electrical system to malfunction, resulting in your headlights only working on high beams. Have your alternator checked by a professional to ensure it is functioning correctly.

7. Poor Ground Connection

A poor ground connection can cause your headlights to function incorrectly, including working only on high beam. Check the ground connection to ensure it is clean and securely attached.

8. Incorrectly Aimed Headlights

If your headlights are not properly aimed, they may only work on high beam. Adjust the aim of your headlights to ensure optimal performance.

9. Faulty Light Switch

A faulty light switch can cause your headlights to malfunction, including only working on high beam. Have a technician check your vehicle’s light switch and replace it if necessary.

10. Bad Light Sensor

If your vehicle is equipped with an automatic light sensor, it can malfunction and cause your headlights to only work on high beam. Have a technician check the sensor and replace it if necessary.

How to Fix LED Headlights That Only Work on High Beam

Fortunately, there are several ways to fix LED headlights that only work on high beam. The first step is to check the alignment of the headlights. This can be done by parking the car on level ground and shining the headlights against a wall or garage door. The

headlights should be pointed straight ahead and slightly down. If they are not, they will need to be adjusted.

Another way to fix LED headlights that only work on high beam is to check the wiring connections. Make sure that all connections are secure and that there are no loose wires. If there are any issues with the wiring, it may be necessary to replace the wiring harness.

Finally, if the above solutions do not work, it may be necessary to replace the LED headlights altogether. There are many different types of LED headlights available on the market, so it is important to do research and choose a reputable brand that is known for producing high-quality headlights.

Why Do My LED Headlights Only Work on High Beam?

LED headlights only working on high beams can be caused by several factors. One of the most common causes is improper alignment, which can cause the headlights to shine too high and only work on a high beam. Another cause could be insufficient power, which may be due to faulty wiring connections or a weak battery. It is also possible that the LED headlights themselves are faulty or of low quality. To fix this issue, it is important to check the alignment of the headlights, ensure proper wiring connections, and choose high-quality LED headlights that are known for their reliability and durability. If these solutions do not work, it may be necessary to consult a professional mechanic or auto electrician for further diagnosis and repair.

Why Is My LED Low Beam Not Working but High Beam Works?

If your LED low beam is not working but the high beam works, there may be several reasons why this is happening. One possible cause is that the low beam bulb itself is faulty or damaged and needs to be replaced. Another possible cause could be a problem with the wiring or connections, which may be preventing power from reaching the low-beam bulb. It is also possible that the headlight control module or switch is malfunctioning, which can affect the low beam but not the high beam. Finally, it could be an issue with the LED driver, which may need to be replaced or repaired. To resolve this issue, it is recommended to check the bulb, wiring, and connections for any damage or loose connections. If these components appear to be in good condition, it may be necessary to have the headlight control module or LED driver checked by a professional mechanic or auto electrician.

Conclusion

LED headlights are a popular upgrade for many drivers due to their superior brightness and longer lifespan. However, it can be frustrating when they only work on high beam. This issue can be caused by improper alignment, insufficient power, or other factors. By checking the alignment of the headlights, ensuring proper wiring connections, and choosing high-quality headlights, drivers can enjoy improved visibility and a better driving experience. If you are still experiencing issues with your LED headlights, it may be best to consult a professional mechanic or auto electrician for proper diagnosis and repair.