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+ - S79LR Window Switch - Left Rear | Supplied from a fuse. |
| B+ - S79RR Window Switch - Right Rear | Supplied from a fuse. |
| Signal - Down @ M74D Window Motor - Driver | The output circuit is switched to ground to activate the component. |
| Signal - Express @ M74D Window Motor - Driver | The output circuit is switched to ground to activate the component. |
| Signal - Up @ M74D Window Motor - Driver | The output circuit is switched to ground to activate the component. |
| Signal - Down @ M74P Window Motor - Passenger | The output circuit is switched to ground to activate the component. |
| Signal - Express @ M74P Window Motor - Passenger | The output circuit is switched to ground to activate the component. |
| Signal - Up @ M74P Window Motor - Passenger | The output circuit is switched to ground to activate the component. |
| Control - Up @ M74LR Window Motor - Left Rear | The output circuit is switched from ground to 12 V to activate the component. |
| Control - Down @ M74LR Window Motor - Left Rear | The output circuit is switched from ground to 12 V to activate the component. |
| Control - Up @ M74RR Window Motor - Right Rear | The output circuit is switched from ground to 12 V to activate the component. |
| Control - Down @ M74RR Window Motor - Right Rear | The output circuit is switched from ground to 12 V to activate the component. |
| Ground | Chassis Ground |
| Component | Description |
|---|---|
| K9 Body Control Module | The module controls various vehicle functions like lighting, central door locking, power windows, etc. |
| M74 Window Motor | The motor M74 is a bidirectional DC motor that moves the component: Front Power Windows & Rear Power Windows |
| S79 Window Switch | The switch has a normally open contact. |
| S146 Window/Outside Rearview Mirror Switch - Driver | The S146 sends a serial data message to the K9 indicating the M74 function that has been requested. |