Parking, Rear or License Lamps

WARNING: This page is about a different car, the 2002 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

For the LH and RH rear park, license, and LH and RH front park lamps, outputs are controlled by the REM and FEM. The headlamp switch is hardwired to the ICM. When the switch is in the headlamp or park position, the ICM will send a command via the network link to the FEM and REM. The REM and FEM will process this information and output the appropriate command to the rear park, license, and front park lamps, which are hardwired to the REM and FEM. Only the left and right rear lamps will provide lamp outage indication. Fault management of the park lamps will provide rear park lamp functionality in the event of certain multifunction switch, headlamp switch, ignition switch, REM or FEM failures. The park lamps are also part of the daytime running lamps (DRL) feature.

The vehicle's electronic functions are divided into zones. The FEM controls the front portion of the vehicle and the REM controls the rear portion of the vehicle. These systems rely heavily on the SCP communication network in order to transmit and receive signals. As a technician it is very important to understand:

Where the input (command) originates from.
All information (messages) necessary in order for a feature to operate.
Which module(s) receive(s) the input or command message.
Does the module which received the input (message), control the output of the feature, or does it output a message over the SCP communication network to another module.
Which module controls the output of the feature.