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)	Wiring, terminals or connectors SJB	REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the no communication concern.
No power in all ignition switch positions	Battery Junction Box (BJB) fuse Wiring, terminals or connectors Ignition switch	Go to Pinpoint Test A .
No power in ACC	Wiring, terminals or connectors Ignition switch SJB	Go to Pinpoint Test B .
No power in RUN	Wiring, terminals or connectors Ignition switch SJB	Go to Pinpoint Test C .
No power in START	Wiring, terminals or connectors Starting system Ignition switch SJB	Go to Pinpoint Test D .
The ignition key is hard to turn	Ignition lock cylinder Ignition key Ignition switch	Go to the Ignition Switch - Mechanical Component Test.
The multifunction switch/hazard switch does not operate correctly	Multifunction switch	CARRY OUT the Multifunction Switch Continuity Test for electrical diagnosis. Refer to appropriate COMPONENT TESTING article.