Horns Circuit Description

Battery voltage is applied at all times to the horn relay at the following terminals:
^ Terminal E6
^ Terminal E8

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.

For Pontiac horn circuit description refer to Horns Circuit Description (Pontiac).