Circuit/System Description
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
The midgate power window is controlled by the midgate control module using inputs from the instrument panel (I/P) midgate window switch, global window switch and the midgate ajar switches. The window switch circuits are referenced from ground by the midgate control module and are determined to be active when high. The ajar switch signal circuit is referenced from battery voltage by the module and is determined to be active when low. The ajar switches are in series and when the midgate is opened both switches must close in order to pull the circuit low. The midgate control module also uses inputs from 2 hall effect sensors located on the motor. The hall sensors enable the control module to monitor the window position and motor speed.