Battery Load Shed
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The BCM monitors the battery state of charge and when necessary will shut off accessories in order to save the remaining battery charge. Refer to: Charging System - System Operation and Component Description .