Test A: The Horn Is Inoperative

PINPOINT TEST A: THE HORN IS INOPERATIVE

A1-A2:

A3-A5:

A6-A8:

A8-A9:

Normal Operation
The horn relay control voltage and switched voltage circuit is supplied by the battery junction box (BJB) through circuit 1680 (OG/RD). The horn relay is controlled through circuit 1 (DB) by the horn switch. When the horn switch is pressed, the horn relay control circuit 1 (DB) is grounded through the clockspring and circuit 460 (YE/LB). The horn relay is then energized causing voltage to be applied to circuit 6 (YE/LG), enabling the horn to sound. Ground to the horn is supplied through circuit 57 (BK).

Possible Causes
- Fuse
- Circuit 1 (DB) open
- Circuit 6 (YE/LG) open
- Circuit 57 (BK) open
- Circuit 460 (YE/LB) open
- Circuit 1680 (OG/RD) open
- Horn
- Horn relay
- Steering wheel switch harness
- Clockspring
- Horn switch (part of the driver air bag module)