Principles of Operation

PRINCIPLES OF OPERATION

NOTE: Due to varying wattage ratings and resulting current draw, certain aftermarket headlamp bulbs may cause the lighting control module (LCM) to shut down the short circuit protection, resulting in the low beams becoming inoperative. Verify that the headlamp bulbs meet Ford specifications.

The LCM receives inputs from the following:
- Headlamp switch
- Multifunction switch

Depending on the inputs received, the LCM commands the headlamps on or off.