What Does the Fog Light Symbol Look Like? A Complete Guide

Fog lights are designed to improve visibility when weather reduces your view of the road. The dashboard symbol tells you when the system is switched on, but the front and rear fog light icons are easy to confuse if you do not see them often.

Knowing the difference matters most in fog, heavy rain, blowing snow, road spray, or other low-visibility conditions. This guide explains what each symbol looks like, where you will see it, when fog lights should be used, and what to check if the warning icon behaves unexpectedly.

What Does the Front Fog Light Symbol Look Like?

The front fog light symbol looks like a headlamp with several horizontal or slightly downward-sloping lines crossed by a wavy vertical line. On many vehicles, the icon points toward the left and appears green when the front fog lights are on.

The wavy line represents fog. The angled light lines indicate a low, wide beam that is intended to illuminate the road surface close to the vehicle rather than project far down the road like a high beam.

Front fog lights are usually mounted low in the bumper. Their beam pattern helps reduce reflected glare in dense moisture, snow, or road spray. If your vehicle uses replaceable fog-light bulbs, you can browse SEALIGHT LED fog light bulbs after confirming the original bulb size.

What Does the Rear Fog Light Symbol Look Like?

The rear fog light symbol is similar, but the beam lines usually point in the opposite direction. The dashboard indicator is often amber or red rather than green.

Rear fog lights are much brighter than normal taillights. Their purpose is to help drivers behind you see your vehicle when visibility is severely reduced. Because they are bright, they should be switched off once conditions improve so they do not distract or dazzle following traffic.

Front Fog Light vs Rear Fog Light Symbol

The quickest way to tell the two icons apart is to look at the direction of the beam lines and the indicator colour.

Front fog light: the beam lines commonly point left, the icon is often green, and it refers to lights mounted low at the front of the vehicle.

Rear fog light: the beam lines commonly point right, the icon is often amber or red, and it refers to a bright rear-facing warning light.

Exact designs vary slightly by manufacturer, so your owner's manual remains the best reference for your specific vehicle.

Where Will You See the Fog Light Symbol?

Most vehicles show the fog light symbol in two places. One is on the control itself, such as the headlight stalk, rotary lighting dial, or dashboard switch. The other is in the instrument cluster, where the indicator illuminates after the fog lights are activated.

Some vehicles require the parking lights or low-beam headlights to be on before the fog lights can operate. Others link front and rear fog lights to separate switch positions. If the symbol does not appear when expected, check the owner's manual before assuming there is a fault.

When Should You Use Fog Lights?

Fog lights are useful when visibility is genuinely reduced by dense fog, heavy rain, blowing snow, road spray, or dust. In these conditions, a low, wide beam can help reveal lane markings, road edges, and hazards near the vehicle.

This is especially useful during winter travel, when darkness, snow, slush, and wet pavement can occur together. Fog lights should still be used selectively. In clear weather, extra low-mounted light may add glare without improving your view.

Rear fog lights deserve even more care because they can be very bright to drivers behind you. Turn them off when visibility returns to normal. Not sure which bulb size your vehicle needs? Use the SEALIGHT Vehicle Bulb Finder to locate your exact fog light match in seconds.

How to Turn On Fog Lights

The exact control varies by vehicle, but the general process is usually simple.

First, switch on the required exterior lights. Many vehicles require the low beams or parking lights to be active. Next, locate the fog light control on the headlight stalk, rotary dial, dashboard, or centre switch panel. Activate the front or rear fog light setting and check that the matching symbol appears in the instrument cluster.

If the icon illuminates but the lamp itself does not, the problem may be a burned-out bulb, fuse, relay, wiring issue, or poor connection.

Why Is My Fog Light Symbol Flickering?

A fog light symbol that flickers, flashes, or turns on and off unexpectedly can point to an electrical or connection problem. Common causes include a loose connector, poor ground, damaged wiring, a failing relay, moisture in the lamp housing, or an ageing bulb.

If the symbol and the actual fog lamps flicker together, inspect the electrical circuit before replacing parts. If only one fog lamp flickers, start with that bulb and connector.

Cold weather, road salt, moisture, and repeated freeze-thaw cycles can expose weak connections, so connector condition and sealing are worth checking during winter maintenance.

What If the Fog Light Bulb Has Burned Out?

If electrical checks are normal and the bulb has failed, replace it with the correct size for the vehicle. Common fog-light sizes include H11-family, 9006/HB4, and H10/9145/9140, but fitment varies by year, trim, and factory lighting package.

You can browse SEALIGHT H11/H8/H9 bulbs, SEALIGHT 9006/HB4 bulbs, or H10/9145 fog light bulbs after verifying the original bulb number. Do not rely on bulb appearance alone, because several automotive bulbs can look similar while using different tabs, connectors, or electrical specifications.

LED Fog Lights: What to Check Before Upgrading

If you are replacing a halogen fog light with LED, focus on fitment, beam control, weather resistance, connector compatibility, and usable light rather than brightness claims alone.

A fog light should keep a low, controlled beam. Excessive upward scatter can create glare in fog, rain, and snow. After installation, check both lamps from the front of the vehicle, confirm the bulbs are fully seated, and make sure the beam height is even.

Frequently Asked Questions

What colour is the front fog light symbol?

It is commonly green, although exact dashboard colours can vary by manufacturer.

What colour is the rear fog light symbol?

It is commonly amber or red to distinguish it from the front fog light indicator.

Why does the fog light symbol stay on?

If the fog lights are switched off but the indicator remains on, check the switch, relay, wiring, or body-control system. A stuck relay or electrical fault can sometimes keep the circuit active.

Can I use fog lights with high beams?

That depends on the vehicle. Many vehicles automatically disable fog lights when high beams are selected. Follow the factory lighting logic and your local road rules.

Do all vehicles have fog lights?

No. Some vehicles do not include front fog lights, and rear fog-light equipment also varies by market and model.

Final Thoughts

The fog light symbol is a simple dashboard indicator, but recognizing the front and rear versions helps you use the system correctly. Use fog lights when visibility is genuinely reduced, switch rear fog lights off when conditions improve, and investigate flickering or unexpected indicators before assuming the bulb itself is the only problem.

If a bulb replacement is needed, verify the original size first and choose a weather-resistant SEALIGHT LED fog light replacement with a controlled beam pattern to keep your night driving safe and clear.