Power Window Motors: Notes
The window motors are mounted on the cable regulators. The window motor control circuit consists of two wires for operating the motor in both directions.
The motors are activated by relays in the GM of door modules (front doors). The relays provide either power or ground depending on the direction of window travel.
The GM controls the polarity of the motor based on a request to run the window (window switch, Convenience Opening/ Closing).
The windows are run to the limit stops which is detected by an amperage increase in the control circuit.
Additionally, the window run cycle is limited to a 6-8 second duration if in case the amperage increase is not detected or there is a malfunction with the regulator.