System Operation - Stoplamps: Stoplamps
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
The BCM monitors the input from the stoplamp switch. When the brake pedal is applied, voltage is routed to the BCM, indicating a request for the stoplamps. The BCM then supplies voltage to the stoplamps.
The BCM uses 3 separate output circuits. The LH and RH rear stoplamp output circuit, the illuminated liftgate applique stoplamp output circuit and high-mounted stoplamp output circuit.
The BCM also provides Field Effect Transistor (FET) protection of the stoplamp output circuits. When an excessive current draw is detected, the BCM disables the affected stoplamp circuit driver. Refer to: Module Controlled Functions - System Operation and Component Description .