Courtesy Lamps

WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

The BCM controls all the interior lighting functions and timing by monitoring inputs from the:

door ajar switches
liftgate ajar switch (manual liftgate)
LTM (power liftgate)
ignition state
courtesy lamp switch (integrated into the FLM )
RKE system
vehicle speed

The BCM sends a 12 volt signal to each door ajar switch and the liftgate latch (manual liftgate) or the LTM (power liftgate). When the doors and liftgate are closed, the voltage signals are pulled low, indicating a closed door or liftgate.

The BCM monitors input from the RKE transmitter (messaged from the TPM module on vehicles without Intelligent Access (IA) or from the RFA on vehicles With Intelligent Access) to determine when to activate/deactivate the illuminate entry feature.

The BCM monitors input from the FLM over the communication network to determine when to activate/deactivate the courtesy lamps. When the courtesy lamp button is pressed on the FLM , it sends a headlamp switch status message to the BCM indicating the request.

The BCM monitors the ignition state to determine when to activate/deactivate the illuminated exit feature.

Based on the input, the BCM controls the solid state relays to provide power to the courtesy lamps.

The BCM also provides an overload protection of the interior courtesy and puddle lamp output circuits. When an excessive current draw is detected, the BCM disables the affected interior courtesy or puddle lamp circuit driver. REFER to MULTIFUNCTION ELECTRONIC MODULES .