Principles of Operation
WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).
The SJB can be configured to turn the Daytime Running Lamps (DRL) on for this vehicle. Refer to MODULE CONFIGURATION for information on this programmable parameter.
The SJB 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
- Transaxle gear selection
When the DRL is active, the SJB provides a Pulse Width Modulated (PWM) voltage to the low beam headlamps. This illuminates the headlamps at a reduced intensity.