High Beam Headlights Not Working (Here Is How To Fix!)

high beam headlights not working

Have you ever wondered why high beam headlights are not working and how to fix that? Well, we got you covered.

High beam headlights are an essential component of your vehicle’s lighting system, allowing for improved visibility during nighttime driving. However, when your high beams fail to illuminate, it can be a frustrating and potentially dangerous situation.

Understanding the possible causes behind this issue is crucial for resolving it promptly.

Bulb Issues

One of the most common reasons why high beam headlights stop working is due to issues with the bulbs themselves. Let’s explore two potential bulb-related problems.

Blown Headlight Bulb

Headlight bulbs have a limited lifespan and will eventually burn out. If only one of your high beam headlights has stopped working, it is likely due to a blown bulb. Replacing a blown bulb is a relatively easy fix.

Most autoparts stores carry a variety of headlight bulbs, making it convenient for you to find a replacement. However, it is essential to consult your vehicle’s owner’s manual to ensure that you purchase the correct type of high beam bulb.

Familiarize yourself with the fuse box as well, as a blown fuse could also be the cause of your high beam malfunction. Before replacing any components, it is advisable to use a digital multimeter to rule out any electrical problems.

Incorrect Bulb

Using an incorrect bulb can also result in high beam headlight issues. If your high beams work intermittently, it could be due to an incompatible bulb.

Make sure to refer to your vehicle’s manual for the correct bulb specifications. Using the wrong bulb wattage or type can cause inconsistent performance and lead to high beam failure.

Always double-check the compatibility of the bulb before making a purchase.

Wiring Problems

Another common cause of high beam headlight malfunctions is faulty or broken wiring. Let’s delve into this issue further.

Faulty or Broken Wiring

The electrical wiring system in your vehicle plays a crucial role in delivering power to the headlights. Over time, wiring can become damaged or develop faults, leading to a loss of connection.

If there is a break in the wiring, the high beams may cease to function. Identifying faulty or broken wiring requires a thorough inspection. If you are familiar with using a digital multimeter, you can check for power at the headlight to determine if there are any disruptions in the electrical flow.

If you are unsure or unable to diagnose the problem yourself, it is advisable to seek assistance from a professional technician or visit a local garage.

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Fuse and Relay Issues

The fuse and relay system in your vehicle is designed to protect the electrical components, including the headlights, from damage. Let’s explore two common fuse and relay issues related to high beam headlight malfunctions.

Blown High Beam Fuse

A blown high beam fuse is a relatively common problem that can be easily fixed. When a fuse detects excessive current flow, it will “blow” or break the circuit, resulting in the headlights not working.

If you find that your high beams are not functioning, checking the fuse box for a blown high beam fuse is a good starting point. Replacing a blown fuse with a new one of the same rating should resolve the issue.

However, if the fuse blows repeatedly, it indicates a deeper underlying problem that requires further investigation to identify the cause of the excessive current flow.

Faulty High Beam Relay

The high beam relay is responsible for controlling the power flow to the high beam headlights. If the relay malfunctions, it can prevent the high beams from working while allowing the low beams to function correctly.

The headlight switch typically powers the high beam relay, which, in turn, powers the headlights. If you suspect a faulty high beam relay, it is advisable to consult a professional technician or visit a service center to have it inspected and replaced if necessary.

Headlight Switch Malfunction

While less common than other issues, a malfunctioning headlight switch can also result in high beam headlight failure.

The headlight switch controls the operation of the headlights, including the high beams. Over time, the switch can wear out or develop faults, leading to inconsistencies in its functionality.

If you notice that the headlight switch does not click into position or feels loose, it may be the cause of your high beam headlight problem. Consulting a factory-trained technician or visiting an authorized dealer can help identify and rectify any issues with the headlight switch.


When your high beam headlights are not working, it can significantly impact your nighttime driving visibility and overall safety on the road.

This troubleshooting guide has explored common reasons behind high beam headlight malfunctions, including bulb issues, wiring problems, fuse and relay issues, and headlight switch malfunctions. By understanding these potential causes, you can take the necessary steps to diagnose and resolve the problem.

However, if you are unsure or uncomfortable with troubleshooting electrical issues in your vehicle, it is always best to seek professional assistance from a qualified technician or visit an authorized service center.

Ensuring the proper functioning of your high beam headlights is essential for a safe and enjoyable driving experience at night.

Steve P.

Steve is an automotive technician, technical writer, and Managing Editor. He has held a lifelong passion for cars, with a particular interest in cars like the Buick Riviera. Steve is based in Boise, Idaho.

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