Chevrolet
Battery voltage is applied at all times to the horn relay at the following
terminals:
A ground is placed on the horn relay coil at terminal F8 when
one of the following actions occur:
| • | A horn switch is pressed |
| • | The body control module (BCM) initiates a tamper/alarm cycle |
The horn relay contacts close. This action applies battery voltage to
the horns. The horns continue to sound until one of the following actions
occur:
| • | The horn switch is released. |
| • | The tamper/alarm cycle ends. |
Pontiac
Battery voltage is applied at all times to the horn relay at the following
terminals:
A ground path is provided to the horn relay coil at terminal F8
under the following conditions:
| • | When the inflator module is pressed against a spring loaded ground
plate in the steering wheel. |
| • | When the BCM initiates a tamper/alarm cycle |
The horn relay contacts close. This action applies battery voltage to
the horns. The horns continue to sound until one of the following actions
occur:
| • | The inflator module is released. |
| • | The tamper/alarm cycle ends. |
