Only took me six weeks to learn my truck automatically dims the headlights when cars approach.

Sounds strange but tonight was the first time after hiking with the clouds that it was dark enough to use the high beams.

I knew the headlights were auto on and off from the auto headlight indicator light, and I love how they come on automatically with the wipers on but I didn’t know that they dim automatically when cars approach. I thought that was more of a high end feature for LED headlights not the old fashioned halogen lights my truck has. Nice feature for night driving, especially how the brights come back on as soon as you pass the car in the other direction.

Part of the reason I did not know about it is it’s not listed on the window sticker explicitly for my truck, as it’s considered part of the XL Driver Assistance Package my truck has, which also includes Emergency Braking Assistance and Collision Detection. Fortunately haven’t had to use that feature yet, but it’s good to have as I’m sure a deer or a car will pull out in front of me some time in the future. I don’t have adaptive cruise control, just regular cruise control on my truck.

In Ford vehicles like the Super Duty, Automatic High-Beam Headlamps (often called automatic dimming) use a windshield-mounted camera to scan the road for lights from other vehicles. 

How It Works

The system is designed to provide maximum visibility at night by keeping your high beams on as much as possible. It automatically switches to low beams (dims) when it detects: 

• Oncoming traffic: Headlights from an approaching vehicle up to 2,000 feet away.
• Traffic ahead: The red tail lamps of a vehicle you are following.
• Ambient light: Sufficient street lighting or enough daylight to make high beams unnecessary. 

Activation Requirements

To use this feature, specific conditions must be met:

• Autolamps Mode: Your lighting control knob must be set to the Autolamps (A) position.
• Vehicle Speed: The system typically only activates high beams when your speed is above approximately 32 mph (52 km/h). It will dim them again if your speed drops below roughly 27 mph.
• Enabled in Settings: The feature must be toggled “On” in your vehicle’s SYNC touchscreen or instrument cluster settings. 

Manual Override

You can override the automatic system at any time by using the lighting stalk: 

• To force high beams: Push the stalk away from you.
• To force low beams: Pull the stalk toward you or move the lighting knob out of the “Autolamps” position. 

Limitations

The system may not dim correctly if the sensor is obstructed or in severe weather like heavy rain, fog, or snow. It can also be confused by highly reflective road signs, which might cause the lights to dim prematurely.