Symptom Chart: Instrument Cluster and Panel Illumination

Condition	Possible Sources	Action
A module does not respond to the scan tool	Fuse Wiring, terminals or connectors Module	REFER to MODULE COMMUNICATIONS NETWORK .
All dimmable illumination does not dim	Refer to the Diagnostic Routine	GO to PINPOINT TEST A .
All dimmable non-networked illumination is inoperative	Refer to the Diagnostic Routine	GO to PINPOINT TEST B .
All dimmable non-networked illumination is always on	Refer to the Diagnostic Routine	GO to PINPOINT TEST C .
The steering wheel switch illumination is inoperative	Refer to the Diagnostic Routine	GO to PINPOINT TEST D .
The LF window control switch illumination is inoperative	Window control switch	VERIFY the operation of the power mirrors. If the power mirrors operate correctly, INSTALL a new window control switch. REFER to GLASS, FRAMES AND MECHANISMS . If the power mirrors do not operate correctly, REFER to REAR VIEW MIRRORS .
The RF, RR or LR window control switch illumination is inoperative or always on	Refer to the Diagnostic Routine	GO to PINPOINT TEST F .
One or more switch or component illumination is inoperative	Refer to the Diagnostic Routine	GO to PINPOINT TEST E .
The IPC illumination is inoperative/does not dim	IPC	Using a scan tool, PERFORM 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 FCIM illumination is inoperative/does not dim	FCIM	Using a scan tool, PERFORM the network test. If the scan tool responds with no communication with the FCIM, REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the FCIM, INSTALL a new FCIM. REFER to INFORMATION AND ENTERTAINMENT SYSTEMS - 8-INCH(203MM) TOUCHSCREEN, 8 SPEAKERS or INFORMATION AND ENTERTAINMENT SYSTEMS - THX 8-INCH (203MM) TOUCHSCREEN, 14 SPEAKERS .
The FDIM illumination is inoperative/does not dim	FDIM	CHECK for normal operation of the audio system. If the audio system operates correctly, INSTALL a new FDIM. REFER to INFORMATION AND ENTERTAINMENT SYSTEMS - 8-INCH(203MM) TOUCHSCREEN, 8 SPEAKERS or INFORMATION AND ENTERTAINMENT SYSTEMS - THX 8-INCH (203MM) TOUCHSCREEN, 14 SPEAKERS . If the audio system does not operate correctly, REFER to INFORMATION AND ENTERTAINMENT SYSTEMS - 8-INCH(203MM) TOUCHSCREEN, 8 SPEAKERS or INFORMATION AND ENTERTAINMENT SYSTEMS - THX 8-INCH (203MM) TOUCHSCREEN, 14 SPEAKERS .
The RHVAC module illumination is inoperative/does not dim	RHVAC module	Using a scan tool, PERFORM the network test. If the scan tool responds with no communication with the RHVAC module, REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the RHVAC module, INSTALL a new RHVAC module. REFER to AUXILIARY CLIMATE CONTROL .