Battery and Cables - Electric - System Operation and Component Description: Notes
WARNING: This page is about a different car, the 2024 Ford Transit-350 HD, 2024 Ford Transit-350, 2024 Ford Transit-250, and 2024 Ford Transit-150. However, it is still accessible from the selected car via links, so may be relevant.
System Operation
This vehicle is equipped with 12 volt battery where the high voltage battery has a high voltage to low voltage energy transfer feature that keeps the 12 volt battery charged.
When the 12 volt battery's voltage is low the high voltage battery transfers the energy to charge the 12 volt battery when the vehicle is off. The high voltage battery needs to be de-energized when servicing the 12 volt battery.