Driving in fog, heavy rain, or snowy conditions can dramatically reduce visibility. That’s where fog lights come in. Positioned lower on your vehicle, these specialized lights are designed to cut through the haze and illuminate the road directly ahead—without bouncing off the fog like your high beams might. But how do you actually turn them on?

In this comprehensive guide, we’ll walk you through how to switch on fog lights, when you should use them, and even provide model-specific instructions for popular car brands. Plus, if you're in the market for replacement bulbs, we'll point you to a trusted option: SEALIGHT LED fog lights.

What Are Fog Lights and When Should You Use Them?

Fog lights are auxiliary lights located low on the front (and sometimes rear) of your vehicle. Unlike standard headlights, fog lights produce a wide, bar-shaped beam that stays close to the road surface, helping you see lane markings and obstacles in poor weather conditions. They are especially useful in thick fog, heavy rain, snowy or dusty roads.

Want a deeper dive? Read our full guide: What Are Fog Lights?

And for safe driving, check out: When to Use Fog Lights

How to Switch Fog Lights On

The fog light button typically features a lamp icon with a downward-facing wavy line. Depending on your vehicle, it’s often on your dashboard, headlight control stalk, or a dial on the left side of your steering wheel. Here's a general guide to help you get started.

Step 1: Locate the Control

Sit in the driver’s seat and look at the left stalk behind the steering wheel — this is the headlight control stalk.

On this stalk, there is a small rotating knob just behind the main headlight control dial (not at the tip, but behind it).

Step 2: Turn on your headlights
Most vehicles require that your low beam headlights be turned on before the fog lights can be activated. This is often the first step in enabling your fog lights.

Step 3: Look for the fog light symbol

Rotate the fog light knob to the ON position.

You should now see a green icon on your dashboard indicating that the rear fog lights are on.

Model-Specific “How-To” Guides

For detailed instructions tailored to your vehicle's make and model, consult your owner's manual. Additionally, online forums and communities can be valuable resources.

For example, here's how to find the fog light button in 2018 Ford F-150 vehicle:

Start your vehicle and make sure your headlights are turned on.

Locate the fog light button: It's a small round button near the headlight dial, usually to the left of the steering wheel on the dashboard.

Press the button to activate the fog lights.

To turn them off, simply press the same button again.

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Frequently Asked Questions

Q: Which button is the fog light?
A: Look for a symbol that looks like a headlamp with lines and a squiggle (front) or straight lines (rear). It’s often near your light controls.

Q: How do I know my fog lights are on?
A: A green or amber indicator light should appear on your dashboard once front fog lights are active.

Q: How to properly use fog lights?
A: Only use fog lights in low-visibility conditions like fog, rain, or snow. Don’t use them in clear weather—they can dazzle other drivers and may be illegal in some regions.

Q: Does “auto” turn on fog lights?
A: No. “Auto” headlight settings usually control your main headlights and daytime running lights. Fog lights usually need to be activated manually.

Need New Fog Light Bulbs? Try SEALIGHT

If your fog lights are dim, yellowed, or not working at all, it’s time for an upgrade. SEALIGHT LED fog light bulbs are:

Brighter and clearer than halogen

Plug-and-play for easy DIY installation

Compatible with popular sizes like H11, H8, H10, 5202, 9145, and more

Designed for better visibility in poor weather

Explore SEALIGHT’s full range of fog light options to drive safer and smarter. Shop Now at SEALIGHT.com

Conclusion

Fog lights may seem like a small feature, but knowing how—and when—to use them can dramatically improve your safety on the road. Follow this guide, find your car’s specific controls, and stay prepared for any weather.