2023 Ford E350-Series Ignition Switch
IGNITION SWITCH
A (lock) – Locks the gearshift lever and allows key removal.
B (accessory) – Allows the electrical accessories, such as the radio, to operate while the engine is not running.
Note: Do not leave the ignition key in this position for too long. This could cause your vehicle battery to lose charge.
C (on) – All electrical circuits are operational and the warning lamps and indicators illuminate.
D (start) – Cranks the engine.