Battery Load Shed
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 - 2.7L EcoBoost (238kW/324PS)/3.5L EcoBoost (272kW/370PS) - Overview .
Refer to: Charging System - 3.3L Duratec - V6/5.0L 32V Ti-VCT - System Operation and Component Description .