Stoplamps Operation (liftgate open)
WARNING: This page is about a different car, the 2018 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
- When the liftgate is open, the RGTM does not supply a liftgate ajar ground signal to the liftgate mounted LH and RH rear lamps and to the auxiliary stoplamps.
- When the liftgate mounted LH and RH rear lamps sense no ground signal on the ajar signal circuit and voltage on the stoplamp circuit, the liftgate mounted stoplamps do not illuminate.
- When the auxiliary stoplamps (part of the rear side marker lamps) sense no ground signal on the ajar signal circuit and voltage on the stoplamp circuit, the auxiliary stoplamps illuminate.
The BCM supplies a high current switched voltage to the rear lamp assemblies to supply the necessary current to operate the stoplamp Light Emitting Diodes (LEDs). The BCM provides a low current voltage signal to the rear lamp assemblies to switch on the stoplamp Light Emitting Diodes (LEDs).
The BCM also provides an 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 .