If you drive a 2017 Jeep Grand Cherokee, you know it’s built for both style and utility. But when thick fog or heavy rain hits, even the best headlights can struggle.
That’s where the fog lights come in. They’re low, wide beams designed to cut through mist and make driving safer.
However, many owners aren’t sure exactly how to switch them on, or why they matter so much. This guide will walk you through the process, cover common mistakes, and share tips for getting the best performance from your Grand Cherokee’s fog lights.
Why Fog Lights Matter On Your 2017 Jeep Grand Cherokee
Fog lights are different from regular headlights. They sit low on the front bumper, and their beam is wider and shorter. This design helps you see the edges of the road and any obstacles near the ground. In thick fog, standard headlights can reflect off the mist, making it harder to see. Fog lights cut under the fog, reducing glare and improving visibility.
Some drivers think fog lights are just for looks, but they have a real safety purpose. In the US, the National Highway Traffic Safety Administration notes that using the right lights in poor weather can lower the risk of accidents.
The 2017 Grand Cherokee comes equipped with factory fog lights on most trim levels, making it easier to handle tough driving conditions.
Understanding Your Grand Cherokee’s Lighting Controls
Before you can turn on the fog lights, you need to know where to find the right controls.
Jeep designed the 2017 Grand Cherokee with a user-friendly lighting system, but it’s easy to miss the fog light feature if you’re not familiar with it.
Main Headlight Switch Location
- The main lighting control is on the left side of the dashboard, near the steering wheel.
- It’s a round dial with several positions: Off, Auto, Parking lights, and Headlights On.
- Pulling the dial outward activates the fog lights.
Indicator Lights On Dashboard
- When fog lights are on, you’ll see a small green icon on your instrument panel. This looks like a lamp with three horizontal lines and a squiggly line through them.
- If you don’t see this, the fog lights are probably not active.
Understanding these basics helps you avoid confusion especially if you switch between vehicles.
Step-by-step: How To Turn On Fog Lights In A 2017 Jeep Grand Cherokee
Let’s break down the process so you can do it quickly, even in bad weather.
1. Start Your Vehicle
Fog lights only work when the ignition is in the “On” or “Run” position.
- Turn On the Headlights
- Rotate the lighting dial to either the Parking lights or Headlights On position.
- The fog lights will not work if the dial is set to “Off” or just on “Auto,” unless it’s dark enough for the main headlights to turn on.
- Pull the Dial Outward
- With the headlights or parking lights on, pull the dial towards you (outward from the dashboard).
- You should feel a slight “click.” The green fog light indicator appears on the dashboard.
- Check the Indicator
- Make sure the green fog light symbol lights up.
- If it doesn’t, double-check your headlight setting or try again.
- Turning Them Off
- Push the dial back in or turn the lighting dial to “Off.”
- The indicator should disappear.
Quick Comparison: Lighting Controls
Here’s a summary for easy reference:
| Control Position | Function | Fog Light Status |
|---|---|---|
| Off | No exterior lights | Not available |
| Auto | Automatic headlights (if dark) | Works only if headlights are on |
| Parking Lights | Small exterior lights | Available |
| Headlights On | Main headlights | Available |
Common Mistakes When Using Fog Lights
Many new owners make simple errors that can keep the fog lights from working or even cause safety issues.
Forgetting The Headlight Position
Fog lights will not turn on if the main dial is in the Off position. Also, if you set the dial to “Auto” during the day, headlights (and therefore fog lights) may not activate.
Using High Beams With Fog Lights
In the 2017 Grand Cherokee, turning on the high beams automatically turns off the fog lights. This is a built-in safety feature, but it surprises many drivers. Fog lights are designed for low-speed, low-visibility conditions, while high beams are for open, clear roads.
Not Checking The Indicator
Always confirm that the green fog light icon is on. It’s easy to think the lights are working, especially in daylight, but a quick glance can save you trouble.
Troubleshooting: When Fog Lights Won’t Turn On
If you’ve followed all the steps and your fog lights still don’t work, here are some things to check:
1. Check The Fuses
Fog lights have their own fuse in the engine compartment fuse box. If the fuse is blown, replace it with one of the same rating.
2. Inspect The Bulbs
Fog light bulbs can burn out over time. If one or both lights don’t come on, check the bulbs and replace them if needed.
3. Wiring Issues
Sometimes, connections get loose or corroded. A mechanic can check the wiring if you’re not comfortable doing it yourself.
4. Software Updates
Rarely, a software issue in the vehicle’s electronics can cause lighting problems. The dealership can check for updates.
If you’re unsure, it’s best to visit a certified Jeep service center.
How To Get The Most Out Of Your Fog Lights
Using fog lights correctly can make a big difference in safety and comfort.
- Use Only in Poor Visibility: Don’t use fog lights in clear conditions. They can dazzle other drivers and are less effective than regular headlights for general driving.
- Keep Them Clean: Fog lights sit low and pick up dirt quickly. Clean the lenses often for best performance.
- Adjust Your Speed: Even with fog lights, slow down in fog or heavy rain. Visibility is still limited.
- Know Local Laws: Some states only allow fog lights in certain conditions. Check your local regulations to avoid tickets.
Real-world Example: Driving Through Fog In The Grand Cherokee
Imagine you’re heading home at night on a rural road. A thick layer of fog rolls in, cutting your visibility to just a few yards.
You switch your headlights to “On” and pull the dial out to activate the fog lights.
Instantly, the road edges become clearer, and you can see where the pavement meets the grass. The wide, low beam lets you spot a fallen branch in time to stop safely.
Without the fog lights, your regular headlights would have bounced off the mist, making it even harder to see.
Upgrading Or Replacing Fog Lights
Some owners choose to upgrade their fog lights for better visibility or a different look.
Led Vs Halogen Fog Lights
The 2017 Grand Cherokee usually comes with halogen fog bulbs, but aftermarket options include LEDs. Here’s a quick comparison:
| Type | Brightness | Lifespan | Cost |
|---|---|---|---|
| Halogen | Standard | Shorter | Lower |
| LED | Brighter | Longer | Higher |
LED fog lights can offer better clarity, but make sure any upgrade is street-legal in your area. Always choose bulbs with the correct fit for your Jeep.
Safety And Legal Considerations
Not all drivers realize there are rules about fog light use. In many US states, it’s illegal to use fog lights in clear weather or to drive with more than four front lights on at once. Fog lights are intended for fog, heavy rain, snow, or dust. If you use them all the time, you could get pulled over.
For more detailed laws on lighting, visit the official NHTSA Headlights and Lighting page.
Quick Reference: Fog Light Operation Summary
Here’s a simple sequence to remember:
| Step | Action | Result |
|---|---|---|
| 1 | Start Vehicle | System ready |
| 2 | Turn Headlights or Parking Lights On | Prepares fog light circuit |
| 3 | Pull Dial Outward | Activates fog lights |
| 4 | Check Dashboard Indicator | Confirms operation |
Frequently Asked Questions
Can I Use Fog Lights And High Beams Together In My 2017 Jeep Grand Cherokee?
No, turning on the high beams will automatically disable the fog lights. This is a safety feature to prevent glare and confusion during poor visibility.
Why Won’t My Fog Lights Turn On Even When I Pull The Dial?
Make sure your headlights or parking lights are on. Fog lights only work with these settings. Also, check the dashboard indicator and the fuse if there’s still a problem.
Are Fog Lights Legal To Use All The Time?
No, fog lights should only be used in poor weather conditions like fog, heavy rain, or snow. Using them in clear weather is illegal in many states and can annoy other drivers.
Can I Upgrade To Led Fog Lights On My 2017 Grand Cherokee?
Yes, many owners switch to LED fog lights for better brightness and longevity. Just make sure the bulbs are DOT-approved and fit your vehicle to stay legal and safe.
How Do I Replace A Burned-out Fog Light Bulb?
Locate the fog light housing under the front bumper, remove the old bulb by twisting it out, and replace it with a matching new one. Always check your owner’s manual for the correct bulb type and safety steps.
Getting the most from your 2017 Jeep Grand Cherokee means knowing how to use all its features. Fog lights are a key tool for safe driving in bad weather. With the steps and tips here, you’ll be ready for whatever the road throws your way.
