Symptom Chart: Instrument Panel and Interior Switches Illumination

WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to: Diagnostic Methods .

Condition	Possible Sources	Action
All dimmable illumination does not dim or increase brightness using the dimmer control from the headlamp switch	Refer to Pinpoint Test	GO to Pinpoint Test A
All BCM voltage supplied dimmable illumination sources are inoperative	Refer to Pinpoint Test	GO to Pinpoint Test B
All BCM voltage supplied dimmable illumination sources are always on	Refer to Pinpoint Test	GO to Pinpoint Test C
All networked illumination is inoperative or does not dim or increase brightness (refer to the list in Description and Operation)	Refer to Pinpoint Test	DIAGNOSE the communication network. Refer to: Communications Network .
One or more steering wheel switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test D
The ignition switch (push button) illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test E
The headlamp switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test E
The tailgate release switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test E
The exhaust brake/roll stability control switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test E
The hazard flasher switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test E
The lane departure switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test E
The adjustable pedal switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test E
The mode select switch (MSS) illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test E
The spot lamp switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test E
The heated rear seat switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test E
The overhead console illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test E
The upfitter auxiliary switches are inoperative	Refer to Pinpoint Test	GO to Pinpoint Test E
An interior lamp switch (vehicles without overhead console) illumination is inoperative or always on	Rear interior lamp	INSTALL a new interior lamp for the one in question.
The left front window control switch illumination is inoperative or always on	Left front window control switch	CHECK the operation of the power window from the left front window control switch. If the power window is inoperative, REFER to: Glass, Frames and Mechanisms . If the power window is operates, INSTALL a new left front window control switch. Refer to: Front Door Window Control Switch - Vehicles With: Front Power Windows .
The right front window control switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test G
The left rear window control switch illumination is inoperative	Refer to Pinpoint Test	CHECK the operation of the power window from the left rear window control switch. If the power window is inoperative, REFER to: Glass, Frames and Mechanisms . If the power window is operates, INSTALL a new left rear window control switch. Refer to: Rear Door Window Control Switch - Super Cab, Vehicles With: Rear Power Windows . Refer to: Rear Door Window Control Switch - Crew Cab, Vehicles With: Rear Power Windows .
The right rear window control switch illumination is inoperative	Refer to Pinpoint Test	CHECK the operation of the power window from the right rear window control switch. If the power window is inoperative, REFER to: Glass, Frames and Mechanisms . If the power window is operates, INSTALL a new right rear window control switch. Refer to: Rear Door Window Control Switch - Super Cab, Vehicles With: Rear Power Windows . Refer to: Rear Door Window Control Switch - Crew Cab, Vehicles With: Rear Power Windows .
The left front door control lock control switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test F
The telescoping exterior rear view mirror switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test F
The right front door lock control switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test G
The power sliding window control switch illumination is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test I
The IPC illumination is inoperative or does not dim	Network communication concern IPC	Using a diagnostic scan tool, CARRY OUT a network test. If the IPC passes the network test, Refer to IPC Hardware Testing . If the IPC does not pass the network test, REFER to: Communications Network .
The FDIM illumination is inoperative or does not dim	Network communication concern APIM FDIM	Using a diagnostic scan tool, CARRY OUT a network test. If the APIM passes the network test, INSTALL a new FDIM. REFER to the Removal and Installation procedure in the appropriate Information and Entertainment System article. If the FDIM illumination still does not function correctly after the repair, Refer to APIM Hardware Testing . If the APIM does not pass the network test, REFER to: Communications Network .
The FCIM illumination is inoperative or does not dim	Network communication concern FCIM	Using a diagnostic scan tool, CARRY OUT a network test. If the FCIM passes the network test, Refer to FCIM HARDWARE TESTING . If the FCIM does not pass the network test, REFER to: Communications Network .