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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 69 (Fixed And MOVEABLE Window System) >> Diagnostic Information and Procedures >> DTC B0969: Rear Defogger Indicator >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

For an overview of the component/system, refer to Rear Window Defogger Description and Operation 

Circuit Description
Rear Defog Indicator Control The output circuit is switched to 12 V to activate the component.
Component Description
K9 Body Control Module The module controls various vehicle functions like lighting, central door locking, power windows, etc.
K33 HVAC Control Module This device is the user interface to control the HVAC system. Some buttons and indicators are hardwired, some functions use serial data communication.
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