For 1990-2009 cars only
Ignition 0: The scan tool displays the current state
of the battery in volts.
Horn Relay: The scan tool displays the commanded state of the horn relay. The scan tool displays on when the BCM allows the horn relay to go to ground to activate the horn. The BCM will command this state when the PANIC button on the keyless entry transmitter is activated or when there is an unauthorized entry into the vehicle.
Horn Relay: The scan tool displays the commanded state of the horn relay. The scan tool displays on when the BCM allows the horn relay to go to ground to activate the horn. The BCM will command this state when the PANIC button on the keyless entry transmitter is activated or when there is an unauthorized entry into the vehicle.
