High Beam and Flash-to-Pass

WARNING: This page is about a different car, the 2014 Ford F-150. 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 and 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.

On vehicles with halogen headlamps, when the BCM receives a request for high beams (the low beams must be on), the BCM supplies voltage to the high beam bulbs.

On vehicles with HID headlamps, when the BCM receives a request for high beams (the low beams must be on), the headlamps remain powered on, and the BCM supplies voltage to the shutter (located within each headlamp). This changes the headlamp beam pattern to illuminate a greater distance.

When the flash-to-pass is requested, the high beams are illuminated as long as the multifunction switch is held in the FLASH-TO-PASS position (regardless if the low beams are on or off).