High Beam & Flash-to-Pass
WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The SCCM monitors the multifunction switch for a flash-to-pass or high beam request. When the multifunction switch is in the FLASH-TO-PASS or HIGH BEAM position, the SCCM sends a message to the BCM to indicate the request.
When the BCM receives an input requesting the headlamps on, the BCM supplies voltage to the low beams. If the low beams are on and the BCM receives a request for high beams (or a flash-to-pass request), the BCM supplies voltage to the high beams.