Test A: The Horn Is Inoperative

PINPOINT TEST A: THE HORN IS INOPERATIVE

Normal Operation
The horn relay control voltage and switched voltage circuits are 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 from the clockspring through circuit 460 (YE/LB) to the vehicle harness. 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).

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Horn
- Horn relay
- Steering wheel switch harness
- Clockspring
- Horn switch (part of the driver air bag module)

A1-A2:

A3-A5:

A6-A8:

A8-A9: