Test A: The Horn Is Inoperative

PINPOINT TEST A: THE HORN IS INOPERATIVE

A1-A2:

A2-A3:

A3-A5:

A5-A8:

A8-A9:

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.

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