Turn on fog lights using the dedicated switch or the steering-column stalk, and make sure your low-beam headlights are on; use them only in poor visibility such as fog, heavy rain, or snow.
Where to find and how to use the fog light control
Fog light controls vary by vehicle make and model. The most common setups fall into a few familiar patterns:
Different control schemes by car type
- Dedicated fog light switch on the dashboard near the headlight controls, often with a fog icon.
- Fog lights activated by turning the headlight switch to a specific position (such as parking or low-beam) and pressing or rotating a control to engage the fog lights.
- Steering-column stalk activation, where you pull toward you or push a small control on the stalk to turn fog lights on or off.
- Some newer vehicles enable fog lights through the infotainment or digital instrument cluster menus.
In many cars, a dash indicator light confirms that the fog lights are on. If you don’t see an indicator or the lights don’t illuminate, consult your owner’s manual or contact the manufacturer for model-specific instructions.
Step-by-step quick guide
Use these steps to engage fog lights quickly and safely:
- Turn on your headlights to the low-beam setting.
- Activate the fog lights with the dedicated switch, stalk, or the appropriate headlight control position.
- Check the dash for the fog light indicator to confirm they’re illuminated.
- Drive with fog lights only in conditions that warrant their use, and switch them off when visibility improves.
Some vehicles require you to meet a minimum headlight condition before fog lights can be activated, so if they don’t engage, verify the headlight mode first and retry.
What to do if they won’t turn on
If your fog lights don’t respond, try these troubleshooting steps:
- Ensure the headlight switch is in the correct position (low beams may be required before fog lights can engage).
- Check the fuse for the fog light circuit in the vehicle’s fuse box.
- Inspect the fog light bulbs for burnout and replace if necessary.
- Test the relay and wiring for corrosion, loose connections, or damage.
- If the problem persists, have a qualified technician diagnose the circuit and components.
Persistent electrical faults can involve multiple components, including wiring and startup relays, so professional inspection is advised if the lights remain inactive.
Safety and best practices
Follow these guidelines to use fog lights responsibly and legally:
- Use fog lights only in conditions with reduced visibility—fog, heavy rain, or snow.
- Turn them off when visibility improves to avoid glare for other drivers.
- Do not use fog lights in clear, dry conditions or when high-beam headlights would be more appropriate.
- Check local regulations, as some regions restrict fog light use or require them to be off when headlights are not needed.
Responsible use helps other drivers and extends the life of your lighting system.
Summary
Fog lights provide extra visibility by projecting a wide, low beam that helps you see and be seen in fog, rain, or snow. Activation is typically via a dedicated dash button, a stalk control, or a headlight control with a fog setting; most systems require the low beams to be on. If they don’t engage, consult your owner's manual, check fuses and bulbs, and seek professional help if needed. Always use fog lights judiciously and follow local laws.