Operation CHARM: Car repair manuals for everyone.

Operation







OPERATION

The front and rear window lift motors are of the permanent magnet type. A battery positive and negative connection to either of the two motor terminals will cause the motor to rotate in one direction. Reversing current through these same two connections will cause the motor to rotate in the opposite direction.

On convertible vehicles, the convertible top switch is hard wired to both window regulator modules by the Power Top Switch Mux circuit. When a top operation input is received by the driver window module, it will ground the respective relay control circuit which in turn will operate the motor. If the convertible top switch is pressed and held to the down position second detent, it will command both modules to drop all windows to the fully down position. The windows cannot be raised when the convertible top switch is in the top down position. When the switch is held in the top up position and all four windows are fully up, the modules will lower the respective front window 40 mm (1.6 in), lower the respective rear window approximately 55 mm (2 in) and the driver window module will ground the top up relay control circuit. Once the top is back up the windows will not raise automatically.

Each individual motor is grounded through their respective switch.