Daytime Running Lamps - Except SRT

Non-SRT vehicles manufactured for sale in Canada and equipped with halogen headlamps illuminate both low beam headlamp bulbs at a reduced intensity when the engine is running, the parking brake is released, the automatic transmission gear selector is not in the PARK position and the exterior lamps are turned OFF. Under the same conditions, vehicles manufactured for U.S. fleet sales and equipped with halogen headlamps illuminate both high beam headlamp bulbs at a reduced intensity.

On non-SRT vehicles equipped with High Intensity Discharge (HID) headlamps regardless of the market, the BCM operates a dedicated DRL bulb (domestic markets) or a combined position/DRL bulb (export markets) through right and left DRL relays to serve as the DRL. On SRT vehicles regardless of the market destination, a separate DRL lamp unit illuminates multiple Light Emitting Diode (LED) units at a high intensity to serve as the DRL.

The BCM must be programmed appropriately for this feature to be enabled. Once enabled, anytime the BCM receives electronic messages over the CAN data bus from the Powertrain Control Module (PCM) indicating the engine is running, from the EMIC indicating the status of the headlamp exterior lighting input is OFF or A (Automatic) and indicating that the parking brake is released, it energizes the appropriate bulbs or LED units. On vehicles with halogen headlamps, the BCM provides a Pulse Width Modulated (PWM) voltage output to illuminate the appropriate headlamp bulbs at the proper intensity. On vehicles with HID headlamps, the BCM provides a path to ground for the DRL relays to produce DRL illumination at the proper intensity.