Symptom Chart

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. 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 Clockspring Horn switch (part of the driver air bag module) PCM	Go to Pinpoint Test A .
The horn is always on	Wiring, terminals or connectors Horn relay Horn switch (part of the driver air bag module) Clockspring Vehicle security module (VSM) (if equipped)	Go to Pinpoint Test B .