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)	Smart junction box (SJB) fuse 26 (10A) Circuitry. SJB.	GO to MULTIFUNCTION ELECTRONIC CONTROL MODULES .
The interior lamps are inoperative	Fuse(s). Circuitry. Smart junction box (SJB). Battery saver relay. Interior lamp relay.	Go To PINPOINT TEST A: THE INTERIOR LAMPS ARE INOPERATIVE .
The interior lamps stay on continuously	Circuitry. Smart junction box (SJB). Interior lamp relay. Battery saver relay. Door ajar switch.	Go To PINPOINT TEST B: THE INTERIOR LAMPS STAY ON CONTINUOUSLY .
The interior lamps do not turn on with one door open	Circuitry. Smart junction box (SJB). Interior lamp relay. Battery saver relay. Door ajar switch.	Go To PINPOINT TEST C: THE INTERIOR LAMPS DO NOT TURN ON WITH ONE DOOR OPEN .
The illuminated entry is inoperative when using the remote keyless entry (RKE) transmitter	Circuitry. Smart junction box (SJB). Remote keyless entry (RKE) module.	Go To PINPOINT TEST D: THE ILLUMINATED ENTRY IS INOPERATIVE WHEN USING THE REMOTE KEYLESS ENTRY (RKE) TRANSMITTER .
The demand lighting is inoperative	Circuitry. Smart junction box (SJB). Battery saver relay.	Go To PINPOINT TEST E: THE DEMAND LIGHTING IS INOPERATIVE .
The battery saver does not deactivate after time-out	Circuitry. Smart junction box (SJB). Battery saver relay.	Go To PINPOINT TEST F: THE BATTERY SAVER DOES NOT DEACTIVATE AFTER TIMEOUT .