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. Battery junction box (BJB) fuse 5 (50A).	REFER to MULTIFUNCTION ELECTRONIC CONTROL MODULES .
The horn is inoperative	Battery junction box (BJB) fuse 5 (50A). Smart junction box (SJB) fuse 13 (15A). Circuitry. Horn switch (part of the steering wheel assembly). Horn.	Go To PINPOINT TEST A: THE HORN IS INOPERATIVE .
The horn is always on	Circuitry. Horn switch (part of the steering wheel assembly). Horn relay (part of the smart junction box [SJB]).	Go To PINPOINT TEST B: THE HORN IS ALWAYS ON .
DTC B1217 and B1218 - horn relay coil circuit failure (vehicle equipped with remote keyless entry)	Circuitry. Horn switch (part of the steering wheel assembly). Horn relay (part of the smart junction box [SJB]).	Go To PINPOINT TEST C: DTC B1217 AND B1218 - HORN RELAY COIL CIRCUIT FAILURE (VEHICLE EQUIPPED WITH REMOTE KEYLESS ENTRY) .