Test A: The Horn Is Inoperative

PINPOINT TEST A: THE HORN IS INOPERATIVE

A1-A4:

A4-A5:

A6-A8:

A9-A11:

A11-A12:

Normal Operation
The battery junction box (BJB) supplies voltage to the horn relay on the control and switched sides through fuse 5 (15A) on circuit 460 (YE/LB). When the horn switch is pressed, the horn relay receives the switched ground signal through circuit 1 (DB), energizing the horn relay. The horn switch provides the ground signal through circuit 848 (DG/OG). The horn relay then sends voltage to the horn on circuit 6 (YE/LG), enabling the horn to sound.

Possible Causes
- Fuse
- Circuit 1 (DB) open
- Circuit 6 (YE/LG) open
- Circuit 57 (BK) open
- Circuit 460 (YE/LB) open
- Circuit 848 (DG/OG) open
- Horn relay
- Horn
- Clockspring
- Horn switch (part of the driver air bag module)