Daytime Running Lights (DRL)

Are the DRLs, dim, flickering, or completely out? Upgrade your DRLs at KGCAR.PH the Philippines Online Auto Parts Store. Daytime Running Lights (DRLs) are low-level lights to increase visibility for other drivers during daylight hours (think of them as running lights for daytime use). Often, DRLs are located in your headlight housing, or near the headlight itself, and are designed to come on automatically when the engine is running. These do not light the road as intended by a full beam set of headlights, they take away the visibility factor from the vehicle you might have had without the DRLs, daylight or otherwise, especially in inclement weather, sometimes with rain and fog, and at dawn or dusk. DRLs can be individual bulbs, or LEDs, or a function in the headlamp housing or fog lamp housing. You might have an array of DRLs.

DRL Replacement Intervals and Factors

DRLs (Daytime Running Lights) are built to last for thousands of hours but will eventually need to be replaced for the following reasons:

• Burnt-out halogen bulbs or failed other LED arrays
• Cracked or fogged DRL housings
• Corroded electrical connectors or wiring faults
• Failure of the DRL control module
• Moisture intrusion is causing the DRL to flicker or have diminished output

Some systems integrate the DRLs into the multifunction headlight assembly, meaning if the DRLs are unable to be serviced, you will need to replace the whole unit.

Choosing the Right DRLs for Your Vehicle

DRLs vary in design, intensity, and wiring configuration depending on the vehicle. Use your vehicle’s year, make, and model to find a compatible replacement. Common types include:

Always verify voltage compatibility and check whether the DRL shares circuitry with turn signals, low beams, or parking lights.

Symptoms of DRL Failure and Related Risks

Malfunctioning DRLs reduce your vehicle’s daytime visibility, which can impact safety in certain road or weather conditions. Common signs of issues include:

• No light when engine is running: May point to a burned bulb, failed relay, or control module issue
• One side dimmer than the other: Often caused by aging LED elements or partial circuit failure
• DRL flickering: Could be due to voltage instability or moisture in the housing
• Dashboard DRL indicator warning: Signaling a system fault or bulb out

While DRLs aren’t typically required at night, non-functioning units may reduce your visibility to others during the day.

Types of DRLs and Their Differences

DRLs vary in construction and output. Each type has different advantages and limitations:

Halogen DRLs

Technology: Low-wattage halogen bulbs
Pros: Simple to replace, low cost
Cons: Shorter lifespan, higher power consumption

LED DRLs

Technology: Surface-mounted or strip-style LEDs
Pros: Long lifespan, bright and energy-efficient
Cons: Can’t be repaired if sealed unit fails

Fiber Optic or Light Guide DRLs

Technology: LED-driven light pipe for modern styling
Pros: Uniform output, premium look
Cons: Replacement often requires full headlight assembly

Integrated DRL/Signal Units

Technology: Dual-function LEDs
Pros: Space-saving, multifunctional
Cons: Complex wiring, may require programming or module updates

DRL Fitment and Compatibility

Always confirm DRL fitment using:

• Bulb type or LED module number
• Connector style and pin count
• Headlight or bumper housing design
• Wiring harness layout
• DRL voltage rating (typically 12V or PWM-controlled)
• Onboard computer compatibility (some vehicles require coding or a reset after replacement)

Using the wrong part can lead to flickering, dashboard errors, or system failure.

Common Mistakes in DRL Maintenance

• Installing incompatible aftermarket LED replacements
• Ignoring condensation inside DRL housings
• Overlooking wiring damage during front-end repairs
• Using high-wattage bulbs that overheat plastic housings
• Forgetting to reset or reprogram vehicle modules when needed
• Misinterpreting DRL failure as a headlight issue