Led Headlights Only Work On High Beam? What Are Its Causes?

Nobody likes it when their beam headlights suddenly stop working in the middle of the night when they’re driving.

The high beams may continue functioning even after the ordinary headlights have burned out. However, it is not recommended to drive in this manner since you might dazzle oncoming traffic.

This article will help you understand why your led headlights only work on high beams and how to fix this problem to ensure your driving safety.

5 Explanations For Why Led Headlights Only Work On High Beam

Why Led Headlights Only Work On High Beam: 5 Explanations

Switch, wiring issues, fuse, bulb, and socket are only a few possible causes of the headlight not working but high beam does.

Defective Switch

The car’s high beams are activated by a lever switch on the column of the vehicle’s center console. Even though it can withstand heavy usage, this switch might fail in the long run.

Although this issue does not arise often, it does occur sometimes.

If the fault is with the switches, you’ll start noticing something that doesn’t feel right. Maybe it’s loose now, or it doesn’t snap as securely into place as it used to.

Contact a nearby authorized reseller and have a technician familiar with your model look at it if you are unsure.

Wiring Problem

The wiring issue is the most important part of any power system, and if it’s not done properly following a wiring diagram, the whole system will fail. Indeed, this is accurate for the LED lights of your car.

The headlights may cease functioning for various reasons, including rats chewing through the wiring beneath the hood or a foundation being associated.

Whether you know how to use a voltmeter, you can examine whether there is electricity in the light and identify what is blocking the electricity from reaching the beam lights.

Bad Replay Or Fuse

Fuse boxes safeguard your car’s electrical components, such as the headlights. In the event of an overcurrent, they are intended to “blow” or rupture the beam circuit.

All the circuit’s parts are shielded from harm by this. For example, a blown headlight fuse might render the headlights inoperable.

A relay is standard equipment in most lighting systems and is used to toggle between the low and high beams. An issue with this relay might cause the headlight to only work on high beams.

Burn-out Bulb

This is by far the most frequent cause of headlight high beams not working. Since low beams are used more commonly than high beams, they tend to be eliminated first.

Some cars use distinct bulbs for their high beams, and others use dual-filament bulbs for their headlights. The bulbs are always checked in case the headlights only work on high beams.

If you want to change the headlight bulbs on your own, you need to be familiar with the proper installation technique for the bulbs you intend to use.

It is frequently the case that knowing this makes the difference between a project being a success and having to spend extra money on new headlight bulbs.

Poor Sockets

You probably already know that most car headlights are bulbs inside residential homes. Unfortunately, the sockets might deteriorate over time.

Because of faulty grounding or other problems, the headlight connector to the bulb is weakened.

If one of your car’s headlights burns out, the other may follow suit. Because of this, oxidation on a connection might be to blame for a failed headlight.

Also, sometimes the low beams will go out, but the high beams will still function because they are connected to a separate circuit.

How To Resolve Headlight Is Not Working

If you want to know how to fix a headlight high beam that isn’t working, you should first figure out why it isn’t working.

Determine Headlight Issues

Determine Headlight Problems

Any of these things, like the bulb, wiring, fuse, socket, or switch, could cause a problem with your headlights.

The procedure for determining the cause of high beams working but not headlights is outlined below.

First, make sure your headlights are on. If your vehicle’s beam headlight bulbs are not functioning, please replace them promptly.

Next, disconnect the electrical wire from the back of the headlight component, undo the holding clip, and take out the LED bulb.

This is the typical procedure for removing a headlight bulb, but it differs by vehicle type. First, simply unplug the electrical harness, remove the old bulb, and replace it.

Next, make sure the lights work properly. If none of the switches light up, go to the next section.

The second step is to access the car’s fuse box. You or the mechanic should remove the faulty headlight circuit’s fuse.

Check the beam fuse for discoloration, in case of necessity, substitute. Please re-engage the headlights. After trying those steps and none of them work, go to the next one.

There, link the voltmeter’s negative lead to the automobile battery’s output end. To check voltage, wire a voltmeter’s positive probe to the harness’s positive probe.

The power comes in through the positive terminal, often marked by a red cable.

Check to see whether there is juice in the plugs. If no electricity is passing through, you should replace it. Please re-engage the headlights. If they still don’t turn on after that, try the following method:

In the fourth step, you should take the negative cable out of the battery terminal. Take off the cover that goes around the wheel’s pillar.

First, disconnect the wire block from the rear of the light switch. Check for loose connections on the wire block or the headlight switch.

Then, use an eraser to gently scrub them clean. Finally, switch on the lights again by plugging them back in. You may have to swap out the headlight switch if it doesn’t work.

Fix Low Or High, Or Low Headlight Is Not Working

How To Repair Low Or High, Or Low Headlight Is Not Working

When both headlights stop working or when both headlights are outa but high beams work, it’s unlikely that a single bulb is the source of the problem.

Most likely, it’s a blown fuse, a problem with the headlight relays, the way the headlights are turned on or off, or an electrical problem.

A damaged fuse is the only possible explanation that you can fix quickly.

You should now find the primary fuse for the lighting network using the vehicle’s owner’s manual and swap it out with a new fuse with the same amperage rating.

If that doesn’t work, the next step is to make a reservation with your trusted technician.

To change the bulb, check the electrical connection at the back of the headlamp first to see if it is damaged or loose.

The bulb’s socket spins into the rear of the headlight shell; giving it a 1⁄4 turn clockwise will release the socket, allowing you to remove the bulb. Next, take out the burned-out bulb.


Can You Choose Between High And Low Beams Using LEDs?

The number of active LEDs determines whether a multi-LED headlamp is operating in low-beam or high-beam mode.

When the LED is adjusted to a low beam, its bulbs dim to make a sharp line, preventing any illumination of the area above the vehicle’s path.

What Should I Do If One Of The Headlights Doesn’t Function But The Other Ones Do?

There are some causes for headlights only working on high beams, but a blown fuse is the only possible reason you can fix it quickly.

Find the primary fuse for the lighting circuits in the owner’s handbook and swap it for a new one with the same amperage rating.

Can I fix The Headlights Only Work On High Beam Case Or Take It To A Repair Shop?

You can fix this problem by determining why both headlights are not working but high beams do. However, this mistake may still occur if you don’t perform it properly.

Therefore, you should take it in for the best repair if you are not mechanically savvy.


Your led headlights only work on high beams, which can happen when there is something wrong with the lighting systems.

Besides frequently cleaning headlights, you should check and repair defective headlights that are not working to ensure safety when driving, especially on nights.

If you are not a professional, let’s find a mechanic!

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