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
The horn is inoperative	Fuse Wiring, terminals or connectors Horn relay Horn switch (part of the steering wheel) Horns Clockspring Bussed electrical center (BEC) Smart junction box (SJB)	Go to Pinpoint Test A .
The horn is always on	Wiring, terminals or connectors Horn switch (part of the steering wheel) Clockspring Horn relay BEC SJB	Go to Pinpoint Test B .