System Operation - Stoplamps, Expedition: Stoplamps
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. 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 shared turn/stop lamp output circuit, RH shared turn/stop lamp output circuit and high-mounted stoplamp output circuit.
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. REFER to Multifunction Electronic Modules .