Conventional/Configurable DRL

WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

For halogen headlamps, the DRL system utilizes the existing circuitry and components from the headlamp low beam system. The DRL system operates the low beam headlamps at a reduced intensity.

For LED headlamps, the DRL system operates the DRL/parking surround Light Emitting Diodes (LEDs) at full intensity.

The BCM monitors the ignition status, the headlamp switch and autolamp status.

There are two types of DRL. Conventional (where it is required) and configurable.

When equipped with conventional DRL, the DRL are active in any headlamp switch position except the HEADLAMPS position.

When equipped with configurable DRL, the DRL may be enabled through the IPC message center. When enabled, the DRL are active only in the AUTOLAMPS headlamp position. When autolamps request the headlamps on, the DRL are de-activated.

The DRL are activated when the following conditions are met:

the ignition is in run
the headlamps have not been turned on by the autolamp system or the headlamp switch
the transmission is not in park

When the transmission is in not in PARK, the PCM sends a message over the HS-CAN1 to the BCM indicating the transmission is not in PARK.

The BCM also provides Field Effect Transistor (FET) protection of the low beam and DRL output circuits. When an excessive current draw is detected, the BCM disables the affected circuit driver. Refer to: Body Control Module (BCM) - System Operation and Component Description .