Symptom Chart

WARNING: This page is about a different car, the 2005 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM

Condition	Possible Sources	Action
The horn is inoperative	Circuitry Horn Clockspring Horn switch (part of the driver air bag module) Central junction box (CJB) Powertrain control module (PCM)	GO to PINPOINT TEST A .
The horn is always on	Circuitry Central junction box (CJB) Clockspring Horn switch (part of the driver air bag module) Vehicle security module	GO to PINPOINT TEST B .