Test A: The Horn Is Inoperative

PINPOINT TEST A: THE HORN IS INOPERATIVE

A1-A2:

A3-A5:

A6-A8:

A9-A10:

A11-A13:

A14:

Normal Operation
The smart junction box (SJB) receives the horn signal through circuit 1 (DB) when the horn switch is pressed, which grounds through circuit 1205 (BK). The SJB then activates the horn relay through circuit 1323 (OG/RD). Voltage is sent to the horn through circuit 6 (YE/LG), and the ground is provided through circuit 1205 (BK).

Possible Causes
- circuit 6 (YE/LG) open
- circuit 1205 (BK) open
- circuit 1323 (OG/RD) open
- circuit 1 (DB) open
- horn relay
- horn
- clockspring
- steering wheel controls
- SJB
- bussed electrical center (BEC)