Symptom Chart

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 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)	Smart junction box (SJB) Circuitry	REFER to MULTIFUNCTION ELECTRONIC MODULES article to continue diagnosis of the SJB.
The ignition switch is inoperative	Smart junction box (SJB) fuse 4 (10A) Ignition switch Circuitry Battery junction box (BJB) fuse(s): 1 (25A) 17 (50A)	Go to Pinpoint Test A .
No power in RUN/ACC	Smart junction box (SJB) fuse 4 (10A) Battery junction box (BJB) fuse(s): 1 (25A) 17 (50A) Ignition switch Circuitry	Go to Pinpoint Test B .
No power in RUN/START	Smart junction box (SJB) fuse 4 (10A) Battery junction box (BJB) fuse(s): 1 (25A) 17 (50A) Ignition switch Circuit	Go to Pinpoint Test C .
The ignition key is hard to turn	Ignition key Ignition lock cylinder Ignition switch	Go to Pinpoint Test D .
The multi-function switch does not operate correctly	Multi-function switch Smart junction box (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.