Exterior Lighting - System Operation and Component Description: Stoplamps
WARNING: This page is about a different car, the 2019 Ford SSV Plug-in Hybrid, 2019 Ford Police Responder Hybrid, and 2019 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
System Diagram
Stoplamps
The BCM monitors the input from the stoplamp switch. When the brake pedal is applied, voltage is routed to the BCM. The BCM then supplies voltage to the stoplamps.
The BCM also provides an overload protection of the stoplamp output circuits. When an excessive current draw is detected, the BCM disables the affected stoplamp circuit driver.