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 communication with the smart junction box (SJB)	Fuse Wiring, terminals or connectors SJB	REFER to MODULE COMMUNICATIONS NETWORK .
One or more stoplamp are inoperative	Fuse Wiring, terminals or connectors Stoplamp switch Bussed electrical center (BEC) SJB	Go to Pinpoint Test H .
The stoplamp are on continuously	Wiring, terminals or connectors Stoplamp switch SJB PCM	Go to Pinpoint Test I .