How do I turn on my fog lights?
Fog lights are typically activated by a dedicated switch or via the steering column stalk. In most vehicles you should have the headlights on low beam first, and many models require a specific action on that control to engage the front fog lights. This guide explains the common control layouts, the step-by-step activation process, safety tips, and troubleshooting if they won’t come on.
Where to find the fog light control
The location and method vary by make and model. The following are the most common configurations you’ll encounter.
- Stalk-based control on the left side of the steering column. On many cars you turn on the low beams, then either pull the stalk toward you or twist a small ring on the end to engage the fog lights. An indicator on the dashboard typically lights up when they’re on.
- Dedicated fog light button on the dash or center console. A separate button or toggle, usually with a fog icon, is pressed to turn the front fog lights on and off.
- Fog lights integrated into the headlight switch. Some vehicles require you to rotate the main headlight knob to the low-beam or auto position and then press or pull a secondary control on the dial to activate fog lights.
- Infotainment or steering-wheel controls on newer models. A few vehicles allow toggling fog lights through the instrument panel menu or a button on the steering wheel, especially in higher trims or SUVs.
Note: Rear fog lights exist in many European vehicles and are controlled by a separate switch in some models. Use them only in heavy fog; in clear conditions they can dazzle drivers behind you and may be illegal in some areas.
How to turn them on and off correctly
The following steps cover the typical activation process. Your exact method may differ, so consult the owner’s manual for model-specific instructions.
- Ensure your headlights are on a mode that supports fog lights. In most cars this means low beams; some vehicles permit fogs with parking lights or in Auto mode.
- Use the appropriate control to turn on the fog lights. This may involve pulling the left stalk, rotating a ring on the stalk or dial, or pressing a dedicated fog light button.
- Check the dashboard indicator for a fog light symbol to confirm they’re activated.
- Turn off the fog lights when visibility improves or you are no longer in foggy conditions, as leaving them on unnecessarily can glare other drivers and drain the battery.
Always switch fog lights off in clear conditions or when another vehicle is close ahead; they are designed for reduced visibility in fog, heavy rain, or snow, not normal nighttime driving.
Troubleshooting and tips
If the lights don’t come on, try these quick checks before you seek service.
Before checking the lights themselves, review the common control layout that applies to your vehicle model. If you still can’t activate fog lights, move to these checks.
- Check that the headlights are actually on low beams and that the fog light control is engaged in the correct mode for your car.
- Inspect fuses and bulbs; a blown bulb or blown fuse will prevent fog lights from functioning.
- Some cars require the engine to be running and the key in the “on” position for fog lights to operate; others may work when the ignition is in accessory mode.
- If there’s no indicator light on the dashboard, consult the manual; some vehicles require different steps, or the fog lights may be disabled by a dealership option.
- Check for regional regulations on rear fog lights; improper use can be illegal and hazardous to others.
If after these checks the fog lights still don’t work, schedule service or visit a professional to diagnose wiring, a faulty switch, or a failed relay.
Regional and model variations you should know
Fog light setups vary internationally and by model year. In Europe, rear fog lights are common and legally required in some conditions, while North American vehicles more often emphasize front fog lights and may disable rear fogs in certain trims. Some modern cars incorporate fog light control into their advanced driver-assistance systems or use infotainment menus for toggling, which can be less intuitive than traditional stalk or button methods. Always refer to your owner’s manual for the exact procedure and any regional limitations.
Summary
Turning on fog lights generally involves having the low beams on first and using a dedicated control—whether a stalk, a button, or an integrated headlight switch—to engage the front fog lights. The exact steps depend on your vehicle’s make and model, so check the owner’s manual if you’re uncertain. Use fog lights only in reduced visibility conditions and be mindful of local regulations to avoid glare or penalties.
Which button is my fog light?
In older vehicles, it is common to find the fog light buttons on your indicator stick, to the left of your steering wheel. In newer vehicles, fog lights are generally controlled via a knob on the panel directly under an air conditioning vent. Using these buttons, you can turn on your fog lights.
How do I know if fog lights are on?
You can tell if your fog lights are on by checking for a symbol on your dashboard, which illuminates when they are active. The symbol looks like a half-oval with a wavy vertical line, and the direction of the line (left for front, right for rear) indicates which fog lights are on. You can also physically see the light from the fog lights, which are usually located lower on the front bumper for front fog lights.
This video demonstrates how to check if your fog lights are on: 57sHelpful DIYYouTube · Sep 19, 2025
On the dashboard
- Look for the symbol: The most reliable way to know if they are on is to look for a specific symbol on your dashboard. This is similar to how the regular headlight symbol works.
- Understand the symbol: The symbol is a lamp with a wavy line and dashes.
- Front fog lights: The wavy line is to the left of the lamp graphic.
- Rear fog lights: The wavy line is to the right of the lamp graphic.
- Check the color: The indicator light on the dashboard for the rear fog lights is often amber, while the one for front fog lights is typically green.
Physically check the lights
- Front fog lights: Look at the front of your car, typically near the bumper. If the lights are on, you will see a low, wide beam of white or yellow light coming from them.
- Rear fog lights: Look at the back of your car. If the rear fog lights are on, you will see a bright red light, in addition to your brake lights.
Important considerations
- Headlights must be on: Most modern cars require your regular headlights to be on before you can turn on your fog lights. If your headlights are off, the fog light icon will not appear on the dashboard even if the switch is in the "on" position.
- They are separate from high beams: Fog lights will not turn on if you have your high beams activated.
- Consult your owner's manual: The exact operation and dashboard symbols can vary by car model, so always refer to your owner's manual for the most accurate information.
You can also watch this video to see the location of the fog light symbol on your dashboard: 58sA&M School of MotoringYouTube · May 13, 2025
How to set fog lights?
We'll be marking 4 in below the measurement from our vehicle. So in this case we'll measure out the 28. In. Make sure we're centered with the vehicle. And place our tape.
What does a fog light symbol look like?
A fog light symbol looks like a lamp with a wavy line through its beam, with the direction of the beam indicating front or rear fog lights. The front fog light symbol shows the wavy line and diagonal beams pointing to the left, typically glowing green or white on the dashboard when activated. The rear fog light symbol shows the wavy line and horizontal beams pointing to the right, and is usually amber or red.
Front fog light symbol
- Appearance: A lamp with a wavy line going through diagonal lines that point to the left.
- Color: Usually green or white on the dashboard.
- Meaning: The front fog lights are on, providing a wide, low beam to cut through fog, rain, or snow.
Rear fog light symbol
- Appearance: A lamp with a wavy line going through horizontal lines that point to the right.
- Color: Usually amber or red on the dashboard.
- Meaning: The rear fog light is on, which is a bright red light to make your car more visible to drivers behind you.
