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Where is the DRL module located?

There isn't a single universal DRL (Daytime Running Lights) module location. In most modern vehicles, the daytime running lights are controlled by the Body Control Module (BCM) or a dedicated Lighting Control Module (LCM); the actual module is often tucked away under the dash, in the engine bay, or built into the headlight assembly, depending on the make and model.

This explainer outlines how DRLs are controlled in contemporary cars, where you’re likely to find the control hardware, and how to verify the location for your particular vehicle. Because layouts vary by year, make and model, check your owner's manual or service diagram for specifics.

How DRL control typically works

In modern vehicles, daytime running lights are a software-enabled function of the vehicle's electrical architecture. As of 2024-25, most DRLs are controlled by the BCM or LCM rather than a separate, standalone module. Some designs place a small DRL module inside the headlight housing; others rely on the BCM/LCM to switch the DRL circuit on or off based on ignition state and charging conditions. The exact hardware varies by manufacturer and generation.

Common locations by design

Many manufacturers follow a few standard layouts for where the DRL control logic or module resides. Here are the typical spots you’ll encounter.

Under-dash area near the steering column, where the BCM or LCM is usually mounted.

Engine compartment fuse/relay box or a nearby power distribution center, sometimes with a small DRL module attached to the inner fender or firewall.

Integrated into the headlight assembly or within the LED headlamp unit in newer cars.

Behind the bumper or inside a wheel-well on some European or specialty models.

Because designs vary, the exact location can differ even among similar models.

How to locate yours on your vehicle

To identify the DRL control location for your specific car, use these steps and clues as a guide.

Consult the owner's manual or a service manual for “Daytime Running Lights” (DRL) diagrams and terminology.

Inspect the interior fuse/relay boxes for fuses labeled DRL or DAYTIME RUNNING LIGHTS.

Look under the dash near the steering column for a module connected to the BCM/LCM wiring harness.

Check the front headlight area for a small module within the headlamp housing or behind the bumper in the light assembly area.

If still unsure, provide your VIN to a dealer or qualified technician to pull the model-specific location from manufacturer diagrams.

Note that in many vehicles, there is no separate, easily accessible “DRL module”; the DRL function is activated by software within the BCM/LCM or integrated into other lighting modules.

What to do if you can't find it

If you cannot locate the DRL control module after checking fuses, diagrams, and common mounting spots, contact a dealer or a certified technician. They can access the vehicle’s service database and confirm the exact location for your exact year/make/model.

Tip: keep your vehicle’s VIN handy when requesting model-specific diagrams, since DRL wiring and module placement can change even within the same generation of a model.

Summary

There is no universal location for a DRL module. In most modern cars, DRLs are controlled by the BCM or LCM, with the hardware either tucked under the dash, mounted in the engine bay, or integrated into the headlamp unit. For precise placement, consult the owner's or service manual, inspect labeled fuses, and, if necessary, consult a dealer with your VIN for model-specific guidance.

How to fix DRL on dashboard?

To fix a DRL light on your dashboard, first check for a burnt-out bulb and replace it. If the light is on after replacing the bulb, or if you have installed LED bulbs, the issue is likely the low power draw causing the system to think the light is out. You can resolve this by installing a CANbus decoder or a resistor, or by switching back to the stock incandescent bulb.
This video shows how to install a CANbus decoder to fix the DRL light on a Honda Odyssey: 56sGuy of All TradesYouTube · May 16, 2024
Step 1: Diagnose the problem

Check for a burnt-out bulb: The most common cause is a simple burnt-out bulb.
Check the fuse: If both DRLs are out, check the fuse for the DRL system.
Consider recent bulb changes: If you recently replaced your bulbs with LEDs, the system is likely being tricked because LEDs draw less power, and a CANbus decoder or resistor is needed.

Step 2: Fix the DRL light

Replace burnt-out bulbs: If a bulb is the issue, replace it with a new, compatible bulb. The warning light should clear after the new bulb is installed and the car is restarted.
Install a CANbus decoder: If you've installed LED bulbs, connect a CANbus decoder in-line with the new LED bulb. This device adds a small electrical load to trick the car's computer into recognizing the bulb is working.
Add a resistor: If a CANbus decoder isn't available, you can add an in-line resistor to the LED bulb's wiring to draw enough power to satisfy the car's system.
Return to stock bulbs: As a last resort, if the above steps don't work, you can remove the LEDs and install the original stock incandescent bulbs, which will likely resolve the issue.

How do I know if my DRL module is bad?

If your daytime running lights do not come on, stay on when the car is off, or produce a burning smell, you may have to replace their module.

Where is the daytime running light module located?

The DRL module is typically located at the front of the vehicle or near one of the headlights. It can also be found inside the vehicle's dashboard, in one of its fenders, or behind the front bumper. The modules won't look the same on every vehicle equipped with daytime running lights, so be careful.

What is a DRL module?

A DRL (Daytime Running Light) module is a control unit that automatically manages a vehicle's daytime running lights. It turns the DRLs on when the engine starts to increase visibility during the day and automatically turns them off or dims them when the headlights are activated at night or in low-light conditions. The module ensures DRLs operate correctly, and a faulty one can cause flickering or non-functional lights.
This video explains what daytime running lights are and how they work: 47sCameron AlfordYouTube · Dec 19, 2023
How it works

Automatic activation: The module detects when the vehicle is on and turns on the DRLs.
Headlight integration: It is designed to turn off or dim the DRLs when the low-beam headlights are switched on, saving the headlight bulbs and preventing other drivers from being dazzled.
Ambient light control: Some advanced modules may use sensors to automatically turn on the headlights and deactivate the DRLs as ambient light decreases.

This video demonstrates how to install DRLs and a controller module: 1mdial2fastYouTube · Jul 26, 2014
Common issues

Faulty module: Symptoms of a failing module include flickering, dim, or completely non-functional DRLs.
Location: The module is typically located near the headlights but can vary, so it's best to check the owner's manual for the specific location.
Failure causes: Exposure to the elements can cause corrosion and water intrusion, leading to failure.

This video explains the process of installing DRLs and the controller module on a vehicle: 53sdial2fastYouTube · Aug 26, 2020

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.