Test A: The Horn Is Inoperative

PINPOINT TEST A: THE HORN IS INOPERATIVE

A1-A4:

A4-A6:

A6-A8:

A8-A10:

A10-A11:

A11-A14:

A14-A15:

Normal Operation
The horn relay control and switched voltage is supplied by the bussed electrical center (BEC) through circuit 2037 (RD). The smart junction box (SJB) receives the horn signal through circuit 1 (DB) from the horn switch (part of the steering wheel). When the horn switch is pressed, ground is supplied through the clockspring to the vehicle harness through circuit 1205 (BK). The SJB then activates the horn relay through circuit 1323 (OG/RD). Voltage is then sent to the horn through circuit 6 (YE/LG), enabling the horns to sound. Ground is provided to the horns through circuit 1205 (BK).

DTC B1217 - sets when a short to voltage is detected on circuit 1323 (OG/RD).

Possible Causes
- Fuse
- Circuit 1 (DB) open
- Circuit 6 (YE/LG) open
- Circuit 1205 (BK) open
- Circuit 1323 (OG/RD) open or short to voltage
- Horn relay
- Horn switch (part of the steering wheel)
- Horns
- Clockspring
- BEC
- SJB