Pinpoint Test E : One Or More Switch Illumination Is Inoperative: Notes
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation and Fault Conditions
The BCM provides a PWM voltage signal to the illumination dimmer switch. This PWM signal is routed through the illumination dimmer switch, Dim Up or Dim Down, then to the SCCM logic control. Based on the occupants selection to increase or decrease the intensity of component illumination, the BCM will increase or decrease the voltage signal to the dimmable components.
Refer to Cluster and Panel Illumination , for schematic and connector information.
Possible Sources
- Wiring, terminals or connectors
- Auxiliary climate control assembly
- Audio unit
- Door lock control switches
- Floor shifter
- Four-Wheel Drive (4WD) mode select switch
- Headlamp switch
- Message center switch
- Overhead console
- Traction control/hazard switch
- Window control switch(es) (Navigator)