Symptom Troubleshooting Chart - Horn

POSSIBLE CAUSE REFERENCE

Problem	Possible Cause	Action
No communication with the smart junction box (SJB)	SJB	See MODULE CONTROLLED FUNCTIONS .
The horn is inoperative	Fuse(s) Circuitry Horn Clockspring Horn switch (part of the steering wheel) SJB	See PINPOINT TEST 1: THE HORN IS INOPERATIVE .
The horn is always on	Circuitry Clockspring Horn switch (part of the steering wheel) SJB	See PINPOINT TEST 2: THE HORN IS ALWAYS ON .