Symptom Chart

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. 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 MULTIFUNCTION ELECTRONIC MODULES article to continue diagnosis of the SJB.
No power in all ignition switch positions	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	Fuse Wiring, terminals or connectors Ignition switch SJB	Go to Pinpoint Test C .
No power in START	Fuse Wiring, terminals or connectors 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 in this article.
The ignition key cannot be removed from the ignition cylinder	Wiring, terminals or connectors Key release interlock actuator Park detection switch (part of the transmission selector lever) SJB	Go to Pinpoint Test G .
The ignition key can be removed from the ignition cylinder regardless of gear selector position	Wiring, terminals or connectors Key release interlock actuator Park detection switch (part of the transmission selector lever) SJB	Go to Pinpoint Test G .
The multi-function switch does not operate correctly	Multi-function switch SJB	For a concern with the exterior lighting, REFER to EXTERIOR LIGHTING article. For a concern with the wipers and washers, REFER to WIPERS AND WASHERS article.