Non-Dimmable Illumination

WARNING: This page is about a different car, the 2017 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

The non-dimmable illumination is on when the delayed accessory relay is active. The delayed accessory relay is active:

When the ignition is on.
For up to 10 minutes after the ignition is cycled from on to off and a front door is not opened.

The BCM sends the ignition status to the DDM and the PDM over the network. The DDM and the PDM relay that message to their respective RDM. Based on the ignition status, the DDM, the PDM and each RDM provide voltage to the following components

NOTE: Some components are optional and are not equipped on every vehicle.

DDM

Left front door lock control switch
Fuel filler door release switch

PDM

Door lock control switch
Window control switch

RDM

Window control switch