Normal Operation
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
The smart junction box (SJB) sends a voltage reference signal to the multifunction switch through circuit 196 (DB/OG). When the multifunction switch is placed in the FLASH-TO-PASS position, the multifunction switch routes the signal to ground.