Symptom Chart

WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

Condition	Possible Sources	Action
No communication with the smart junction box (SJB)	Fuse Wiring, terminals or connectors SJB	REFER to MODULE COMMUNICATIONS NETWORK article.
The control illumination is inoperative - all hardwired illumination	Fuse Wiring, terminals or connectors SJB	Go to Pinpoint Test A .
The control illumination is always on - all hardwired illumination	Wiring, terminals or connectors SJB	Go to Pinpoint Test B .
All instrument panel illumination does not dim	Wiring, terminals or connectors Instrument panel dimmer switch SJB	Go to Pinpoint Test C .
The steering wheel control illumination is inoperative	Wiring, terminals or connectors Steering wheel control switches Steering wheel control switch harness Clockspring	Go to Pinpoint Test D .
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 article. TEST the system for normal operation. If the power windows do not operate correctly, REFER to GLASS, FRAMES AND MECHANISMS article.
The door lock control switch illumination is inoperative	Wiring, terminals or connectors Door lock switch	Go to Pinpoint Test E .
The roof opening panel switch illumination is inoperative	Wiring, terminals or connectors Roof opening panel switch	Go to Pinpoint Test F .
The individual component illumination is inoperative	Wiring, terminals or connectors Adjustable pedal switch Auxiliary climate control switches (if equipped) Clock (if equipped) Decklid release switch (if equipped) Floor shifter Hazard/parking aid/roll stability control/power liftgate switch Headlamp switch Rear heated seat switches (if equipped)	Go to Pinpoint Test G .
All network controlled illumination does not dim	Medium speed controller area network (MS-CAN) SJB	CARRY OUT the network test. If the scan tool responds with no communication to any module on the MS-CAN, REFER to MODULE COMMUNICATIONS NETWORK article. If the scan tool communicates with the modules on the MS-CAN, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
The instrument cluster (IC) illumination is inoperative	IC	CARRY OUT the network test. If the scan tool responds with no communication with the IC, REFER to MODULE COMMUNICATIONS NETWORK article. If the scan tool communicates with the IC, INSTALL a new IC. REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES article. TEST the system for normal operation.
The climate control module illumination is inoperative	Climate control module	CARRY OUT the network test. If the scan tool responds with no communication with the climate control module, REFER to MODULE COMMUNICATIONS NETWORK article. If the scan tool communicates with the climate control module, INSTALL a new climate control module. REFER to CLIMATE CONTROL article. TEST the system for normal operation.
The audio control module (ACM) illumination is inoperative	ACM	CARRY OUT the network test. If the scan tool responds with no communication with the ACM, REFER to MODULE COMMUNICATIONS NETWORK article. If the scan tool communicates with the ACM, CHECK for ACM DTCs. CORRECT any DTCs if present. If no DTCs are present, REMOVE the ACM. REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. SEND it to an authorized repair facility. TEST the system for normal operation.
The DVD player illumination is inoperative	Rear entertainment module (RETM)	CARRY OUT the network test. If the scan tool responds with no communication with the RETM, REFER to MODULE COMMUNICATIONS NETWORK article. If the scan tool communicates with the RETM, REMOVE the RETM. REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. SEND it to an authorized repair facility. TEST the system for normal operation.