Symptom Chart

WARNING: This page is about a different car, the 2007 Ford Ranger. 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)	Circuitry SJB	REFER to MODULE COMMUNICATIONS NETWORK article.
One or more parking, rear or license plate lamps is inoperative	Fuse Circuitry Headlamp switch SJB	Go to Pinpoint Test L .
The parking, rear and license plate lamps are always on	Circuitry Headlamp switch SJB	Go to Pinpoint Test M .