Interior Lighting

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

The FEM controls the outputs to all interior lighting. The lamps are illuminated if any door is ajar. The front door switches are hardwired to the FEM. When either of the two doors is opened, the FEM commands the interior lamps on by supplying the ground circuit. The rear door ajar switches are hardwired to the REM. When any of these doors are ajar, the REM sends a command through the SCP network to the FEM. The FEM then commands the appropriate interior lamps on.

Fault management of the interior lamps provides limited functionality in the event of certain dome or lighting mode inputs, vehicle speed or ignition switch failures. All interior lighting is powered by the switched system power (SSP) feature (see below). A failure of any or all of the SSP feature(s) could cause inoperative interior lighting. When diagnosing the interior lighting, it is essential to determine if all relative symptoms and DTCs are controlled by the SSP feature.