Chevrolet Sonic Repair Manual: Horns System Description and Operation
- System Description
-
The horn system consists of the following components:
- HORN fuse
- Underhood fuse block (contains PCB horn relay)
- Horn switch
- Horn
- Body control module (BCM)
- System Operation
-
The vehicle horn system is activated under the following conditions:
- When the horn switch is depressed
- The BCM commands the horns ON under any of the following conditions:
- When the content theft deterrent system detects a vehicle intrusion?€”For further information refer to Theft Systems Description and Operation.
- 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.
When the OnStar?® system is used to sound the horns if equipped?€”For further information, refer to OnStar Description and Operation.
- Circuit Operation
-
Battery positive voltage is applied at all times to the horn relay coil and the horn relay switch. Pressing either of the horn switches applies ground to the horn relay control circuit. The 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.
Horn Replacement
Horn Replacement
Callout
Component Name
Preliminary Procedure
Remove the front wheelhouse liner front. Refer to Front Wheelhous ...
Steering Wheel Horn Contact Replacement
Steering Wheel Horn Contact Replacement
Callout
Component Name
Preliminary Procedure
Remove the steering wheel inflatable restr ...
Other materials:
Power Outlets
The accessory power outlets can be used to plug in electrical equipment, such
as a cell phone or MP3 player.
The vehicle has an accessory power outlet in front of the cupholders on the center
floor console.
Remove the cover to access and replace when not in use.
Warning
Power is always suppl ...
Making a Call Using Phone Book
For cell phones that support the phone book feature, the Bluetooth system can
use the contacts stored on your cell phone to make calls. See your cell phone's
owner's guide or contact your wireless provider to find out if this feature is supported
by your phone.
When a cell phone suppo ...
Transmission Fluid Pump, Front Differential Carrier Baffle, and Front Differential
Ring Gear Removal (6T40/45)
Transmission Fluid Pump, Front Differential Carrier Baffle, and Front
Differential Ring Gear Removal
Callout
Component Name
1
Front Differential Carrier Baffle Bolts M6 x 25 (Qty: 2)
...
0.0058