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9C-7 Instrumentation / Driver Info. / Horn:
Horns System Description and Operation
System Description
The horn system consists of the following components:
• HORN fuse
• Horn relay
• Horn slip ring
• Horn switch
• Horn assembly
• Body Control Module (BCM)
System Operation
The vehicle horn system is activated under the following
conditions:
• The horn switch is depressed.
• The body control module (BCM) commands the horns
on. The BCM commands the horns on under any of
the following conditions:
Horn Schematic Icons
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Instrument Cluster Schematics
Schematic and Routing Diagram
WARNING
!
When performing service on or near the SIR components or the SIR
wiring, the SIR system must be disabled. Refer to SIR Disabling and
Enabling. Failure to observe the correct procedure could cause
deployment of the SIR components, personal injury, or unnecessary
SIR system repairs.
– When the panic button is depressed on the remote
control door lock transmitter. For further information
refer to "Keyless Entry System Description and
Operation: ".
– When the keyless entry system is used to lock the
vehicle, a horn chirp may sound to notify the driver
that the vehicle has been locked. The notification
feature may be enabled or disabled through
personalization. For further information refer to
"Keyless Entry System Description and Operation:
".
Circuit Operation
Battery positive voltage is applied at all times to the horn
relay coil and the horn relay switch. Pressing the horn
switch applies ground to the horn relay control circuit.
The body control module (BCM) may also apply ground
to the horn relay control circuit as described above.
When the horn relay control circuit is grounded, the horn
relay is energized and battery positive voltage is applied
to the horns through the horn control circuit. The horns
sound as long as ground is applied to the horn relay
control circuit.
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