Symptom Chart

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. 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 Circuitry Horn Clockspring Steering wheel switch harness Horn switches (part of the steering wheel) Smart junction box (SJB)	Go to Pinpoint Test A .
The horn is always on	Circuitry Clockspring Steering wheel switch harness Horn switches (part of the steering wheel) SJB	Go to Pinpoint Test B .