Normal Operation - Mountaineer
WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The headlamp switch sends power through circuit 13 (RD/BK) to the multifunction switch. The multifunction switch then routes power to the low beam headlamps through circuit 13 (RD/BK).