The charging system is a negative ground system consisting of:
The generator is driven by the accessory drive belt. When the engine is started, the generator begins to generate AC which is internally converted to DC. The DC is controlled by the voltage regulator (located on the rear of the generator) and supplied to the battery. The PCM controls the voltage regulation set point, working with the generator internal voltage regulator over 2 control and communication circuits.
Charging
GeneratorFord Focus Battery and Cables
Vehicles are equipped with a 12-volt, maintenance-free battery.
The battery and cable system consists of the following components:
Battery
Battery cable assembly
Battery tray
The battery is a 12V DC source connected in a negative ground system. The battery
case is sealed with 2 ve ...