If the daytime running lights (DRLs) on your 2021 Dodge Durango stopped working, it might seem like a mystery at first. These lights are supposed to turn on automatically when the engine is running — without needing to touch the headlight switch. When they go dark, there’s usually a simple electrical fault or a software setting causing it.
Let’s go through each step to help you find the problem quickly and avoid a trip to the dealership.
Start With Settings in the Uconnect System
Your Durango gives you the option to turn the DRLs off through the infotainment system. Here’s how to check:
- Go to the Uconnect screen
- Tap “Settings”
- Choose “Lights”
- Look for “Daytime Running Lights” and make sure it’s turned ON
Sometimes these settings reset after a battery change or software update. If it’s off, toggle it back on and restart the engine to see if they come back.
Check the DRL Fuse
Fuses for the DRLs are located in the under-hood power distribution center. On the 2021 Durango, look for a fuse labeled something like “Daytime Running Lamp” or “DRL Module.” Use the owner’s manual for exact placement.
Pull the fuse and inspect it. If it’s blown, replace it with the same rating. If the new fuse blows again immediately, there’s likely a short in the wiring or a bad component drawing too much power.
Test the Bulbs or LED Modules
The DRLs on a 2021 Durango are built into the LED headlamp assembly. If one side is out and the other works, it might be a faulty LED strip. Unfortunately, LED DRLs are usually not serviceable — if they fail, you often need to replace the entire headlight housing.
Inspect the front of both lights and check for:
- Discoloration or flickering
- Moisture buildup inside the housing
- Only one side lighting up
Replacement factory LED headlight assemblies can cost over $1,000, but aftermarket options are available. If you’re replacing both sides and want something built to last, check out the Spyder Auto Projector Headlights for Dodge Durango 2021+. They run around $1,200–$1,400 for the set.
Inspect the Front Sensor and Ambient Light Detection
DRLs won’t come on if the vehicle thinks headlights should be on instead. That’s controlled by the ambient light sensor on the dash. If it’s covered or faulty, it might be defaulting to headlight mode and skipping DRLs entirely.
Try this:
- Make sure the dash sensor isn’t blocked by a dash mat, papers, or clutter
- Put the light switch in “Auto” and see what lights come on
- Test the DRLs again during bright daylight conditions
Check for Software Updates
The 2021 Durango’s lighting system is controlled by multiple computers — including the BCM (Body Control Module). Occasionally, software bugs can disable DRLs or cause them to behave strangely.
If you’re getting other lighting oddities, visit a dealer and ask about a software flash or update. It may be covered under warranty or a TSB (Technical Service Bulletin).
Scan for Fault Codes
Even if no warning lights appear, a scan tool might show a stored code related to DRLs, the BCM, or the lighting control system. Many auto parts stores offer free OBD-II scanning — or you can use your own tool like the BlueDriver Bluetooth Pro OBD2 Scanner. It’s around $120 and works with your phone.
Final Test: Confirm Conditions for DRL Activation
Remember, DRLs only work under certain conditions:
- Engine is running
- Vehicle is in gear (not in Park)
- Parking brake is fully released
- Uconnect setting is enabled
If one of those isn’t met, your DRLs won’t turn on — and it might just be a simple oversight.
Wrap-Up: Keep It Simple Before Replacing Parts
DRLs on the 2021 Durango are reliable, but they depend on several systems working together: software, sensors, modules, and wiring. Check your settings, your fuses, and your conditions first. Only then move on to more expensive repairs like the LED modules or headlight assemblies.
When in doubt, scan the system — because guessing with modern electronics usually ends in frustration or wasted money.