Symptom Chart

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

Condition	Possible Sources	Action
No power in all ignition switch positions	Fuse Wiring, terminals or connectors Ignition switch Bussed Electrical Center (BEC)	Go to Pinpoint Test A .
No power in ACC	Fuse(s) Wiring, terminals or connectors Ignition switch Smart Junction Box (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 Ignition switch SJB	Go to Pinpoint Test D .
The ignition key is inoperative/hard to turn	Ignition key Ignition lock cylinder Ignition switch	Go to the Ignition Switch - Mechanical Component Tests .
The multifunction switch does not operate correctly	Multifunction switch	For exterior lighting concerns, REFER to diagnosis and testing in EXTERIOR LIGHTING article. For wiper and washer concerns, REFER to diagnosis and testing in WIPERS AND WASHERS article.