Principles Of Operation

Daytime Running Lamps (DRL)

Principles of Operation

NOTE: When installing a new Lighting Control Module (LCM), it must be configured for this feature if originally equipped (standard for Canadian vehicles). Refer to Module Configuration [1][2]Initial Inspection and Diagnostic Overview.

The LCM controls the Daytime Running Lamps (DRL) by using various inputs to determine whether or not the DRL should be illuminated. These inputs include:

- Ignition switch position
- Headlamp switch position
- Headlamps on or off
- Transmission gear selection

The LCM can be configured to turn the DRL on for this vehicle. Refer to Module Configuration [1][2]Initial Inspection and Diagnostic Overview for information on this programmable parameter.