Symptom Chart

WARNING: This page is about a different car, the 2004 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).	SJB. Circuitry.	REFER to MULTIFUNCTION ELECTRONIC CONTROL MODULES .
Both headlamps are inoperative	Smart junction box (SJB). Headlamp switch. Circuitry. Multifunction switch.	Go To PINPOINT TEST A: BOTH HEADLAMPS ARE INOPERATIVE .
The low beams are inoperative	Smart junction box (SJB) Circuitry. Multifunction switch.	Go To PINPOINT TEST B: THE LOW BEAMS ARE INOPERATIVE .
The high beams are inoperative	Smart junction box (SJB). Circuitry. Multifunction switch.	Go To PINPOINT TEST C: THE HIGH BEAMS ARE INOPERATIVE .
One low beam headlamp is inoperative	Smart junction box (SJB). Circuitry.	If the LH low beam headlamp is inoperative, REPAIR circuit 1055 (WH/LG). TEST the system for normal operation. If the RH low beam headlamp is inoperative, REPAIR circuit 1056 (DB/LG). TEST the system for normal operation.
One high beam headlamp is inoperative	Circuitry.	REPAIR circuit 12 (LG/BK). TEST the system for normal operation.
The headlamps are on continuously	Circuitry. Headlamp switch. Multifunction switch. Smart junction box (SJB).	Go To PINPOINT TEST D: THE HEADLAMPS ARE ON CONTINUOUSLY .
The flash-to-pass feature is inoperative	Circuitry. Multifunction switch. Smart junction box (SJB).	Go To PINPOINT TEST E: THE FLASH-TO-PASS FEATURE IS INOPERATIVE .