Symptom Chart

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
All dimmable illumination does not dim	Wiring, terminals or connectors Instrument panel dimmer switch Steering Column Control Module (SCCM)	GO to PINPOINT TEST A .
All dimmable non-networked illumination is inoperative	Wiring, terminals or connectors Instrument panel dimmer switch BCM	GO to PINPOINT TEST B .
All dimmable non-networked illumination is always on	Wiring, terminals or connectors BCM	GO to PINPOINT TEST C .
The steering wheel switch illumination is inoperative	Wiring, terminals or connectors Message center switch Steering wheel controls switch Steering wheel harness Clockspring SCCM	GO to PINPOINT TEST D .
The Audio Control Module (ACM) illumination is inoperative - base AM/FM radio	Wiring, terminals or connectors ACM	GO to PINPOINT TEST E .
The Audio Control Module (ACM) illumination is inoperative/does not dim - except base AM/FM radio	MS-CAN ACM	CARRY OUT the network test. If the scan tool responds with no communication with the ACM, REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the ACM, INSTALL a new ACM. REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . TEST the system for normal operation.
One or more switch illumination is inoperative	Wiring, terminals or connectors Door lock control switch Illuminated switch	GO to PINPOINT TEST E .
The window control switch illumination is inoperative	Window control switch	CHECK the operation of the power windows. If the power windows operate correctly, INSTALL a new window control switch. REFER to GLASS, FRAMES AND MECHANISMS - WITH WINDOW ONE-TOUCH UP (with window one-touch up) or GLASS, FRAMES AND MECHANISMS - WITHOUT WINDOW ONE-TOUCH UP (without window one-touch up). TEST the system for normal operation. If the power windows do not operate correctly, REFER to GLASS, FRAMES AND MECHANISMS - WITH WINDOW ONE-TOUCH UP (with window one-touch up) or GLASS, FRAMES AND MECHANISMS - WITHOUT WINDOW ONE-TOUCH UP (without window one-touch up).
All network controlled illumination does not dim	Controller Area Network (CAN) concern BCM	CARRY OUT the network test. If the scan tool responds with no communication to any module on the CAN, REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the modules on the CAN, INSTALL a new BCM. REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
The Instrument Panel Cluster (IPC) illumination is inoperative	HS-CAN IPC	CARRY OUT the network test. If the scan tool responds with no communication with the IPC, REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the IPC, INSTALL a new IPC. REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES . TEST the system for normal operation.
The HVAC module illumination is inoperative	MS-CAN HVAC module	CARRY OUT the network test. If the scan tool responds with no communication with the HVAC module, REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the HVAC module, INSTALL a new HVAC module. REFER to CLIMATE CONTROL . TEST the system for normal operation.
The Trailer Brake Control (TBC) module illumination is inoperative	HS-CAN TBC module	CARRY OUT the network test. If the scan tool responds with no communication with the TBC module, REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the TBC module, INSTALL a new TBC module, REFER to AUXILIARY BRAKE SYSTEM -- F250-F550 SUPER DUTY . TEST the system for normal operation.