Principles of Operation
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
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
article.
The LCM controls the 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 article for information on this programmable parameter.