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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis >> Body & Frame >> Fixed And MOVEABLE Windows >> Diagnostic Information and Procedures >> Power Windows Malfunction >> Circuit/System Description
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Circuit/System Description

For an overview of the component/system, refer to Power Windows Description and Operation 

Circuit Description
B+ - M74D Window Motor - Driver Supplied from a fuse.
B+ - M74P Window Motor - Passenger Supplied from a fuse.
B+ - M74LR Window Motor - Left Rear Supplied from a fuse.
B+ - M74RR Window Motor - Right Rear Supplied from a fuse.
Power Window Switch Driver Down Signal The output circuit is switched to ground to activate the component.
Power Window Switch Driver Express Signal The output circuit is switched to ground to activate the component.
Power Window Switch Driver Up Signal The output circuit is switched to ground to activate the component.
Power Window Switch Passenger Down Signal The output circuit is switched to ground to activate the component.
Power Window Switch Passenger Express Signal The output circuit is switched to ground to activate the component.
Power Window Switch Passenger Up Signal The output circuit is switched to ground to activate the component.
Power Window Switch Left Rear Down Signal The output circuit is switched to ground to activate the component.
Power Window Switch Left Rear Express Signal The output circuit is switched to ground to activate the component.
Power Window Switch Left Rear Up Signal The output circuit is switched to ground to activate the component.
Power Window Switch Right Rear Down Signal The output circuit is switched to ground to activate the component.
Power Window Switch Right Rear Express Signal The output circuit is switched to ground to activate the component.
Power Window Switch Right Rear Up Signal The output circuit is switched to ground to activate the component.
Ground Chassis Ground
Component Description
S79D Window Switch - Driver The switch has a normally open contact.
M74D Window Motor - Driver
  • Power Window Control
  • The control module and the DC motor are one assembly.
S79P Window Switch - Passenger The switch has a normally open contact.
M74P Window Motor - Passenger
  • Power Window Control
  • The control module and the DC motor are one assembly.
S79LR Window Switch - Left Rear The switch has a normally open contact.
M74LR Window Motor - Left Rear
  • Power Window Control
  • The control module and the DC motor are one assembly.
S79RR Window Switch - Right Rear The switch has a normally open contact.
M74RR Window Motor - Right Rear
  • Power Window Control
  • The control module and the DC motor are one assembly.
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