Test A: The Horn Is Inoperative

PINPOINT TEST A: THE HORN IS INOPERATIVE

A1:

A1-A3:

A3-A4:

A5-A7:

A8:

Normal Operation
The horn relay B+ power is supplied through circuit 1682 (RD/LB). The horn relay is controlled by the horn switch. The horn relay is grounded through the horn switches by circuit 6 (YE/LG). When the horn switch is pressed, the horn relay control circuit 6 (YE/LG) is grounded through circuit 57 (BK). The relay is then closed causing B+ voltage to be applied to circuit 1 (DB), sounding the horns. The smart junction box (SJB) can also supply a ground for the horn relay coil.

Possible Causes
- fuse(s)
- circuit 1 (DB) open
- circuit 6 (YE/LG) open
- circuit 57 (BK) open
- circuit 1682 (RD/LB) open
- horn relay
- horns
- clockspring
- horn switch
- SJB