Chevrolet Cruze Repair Manual: Rear Window Defogger Description and Operation
Rear Window Defogger System Components
The rear window defogger system consists of the following components:
- HVAC Control Module
- HVAC Control Head
- Rear Window Defogger Relay
- Rear Defogger Grid
- F28UA 40A Fuse
Rear Window Defogger Operation
The rear defog control system utilizes a single zone backlight design, driven with a single relay configuration. Additionally, up to two outside rear view mirrors can be heated if required. A switch for the customer to control the system is provided within the HVAC control head. Also included in the HVAC control head is an indicator to inform the customer with the current state of the system. The system is only operational when engine is running or during remote start.
Pressing the heated rear window switch on the HVAC control face plate causes the HVAC control head to send a serial data message to the HVAC control module requesting rear window defog operation. The HVAC control module upon receipt of the serial data message will provide voltage to the coil side of the rear window defogger relay, this will energize the relay causing the relay switch contacts to close allowing B+ voltage to flow through the rear defogger grid control circuit to the rear defogger grid.
When the rear heated window switch is pressed and the engine is running, the rear defog control system will remain active for 10 minutes.
After the initial cycle has lapsed, pressing the switch again will continue rear window defogger operation, but the cycle will only last 5 minutes. The rear defog control system will function continuously if the vehicle speed is greater than 70 kilometers per hour (45 mph).
Stationary Window Description
Most stationary windows, specifically windshields, are retained to the body with urethane adhesive which adheres the window to the body.
This increases structural integrity. The reinstallation of windows with urethane adhesive requires complete replacement of the urethane adhesive bead: The extended method (also known as long method, full strip or full cut) is the only recommended procedure for General Motors Vehicle.
Special Tools and Equipment
Power Windows Description and Operation
Power Windows System Components
The power window system consists of the following components:
Driver window switch
Passenger window switch
Left rear window switch
Right rear window switch
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Horns
Specifications
Horn Replacement
Preliminary Procedure
Remove the front bumper fascia. Refer to Front Bumper Fascia Replacement.
Horn Nut
Caution: Refer to Fastener Caution in the ...
Other materials:
Windows
WARNING
Never leave a child, a helpless adult, or a pet alone in a vehicle, especially
with the windows closed in warm or hot weather.
They can be overcome by the extreme heat and suffer permanent injuries or even
death from heat stroke.
The vehicle aerodynamics are designed to improve fuel ...
Vehicle Positioning
At times, the position of the vehicle on the map could be inaccurate due to one
or more of the following reasons:
• The road system has changed.
• The vehicle is driving on slippery road surfaces such as sand, gravel, or snow.
• The vehicle is traveling on winding roads or long straight roads.
...
Installation Procedure
Cut the front compartment front rail in corresponding locations to fit
the remaining original panel. The sectioning joint should be
trimmed to allow a gap of one-and-one-half-times the metal thickness at the
sectioning joint.
Create a 50 mm (2 in) backing plate from the unused porti ...
