Power windows: It activates the internal mechanism that rolls the windows up and down.
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It may be manually activated with a window crank, or electrically activated with just a switch. Cranks are always attached to the door itself, while switches may be either on the door or the central console.
I need a copy of the fuse box diagram as I have a problem with my rear drivers side electric window. Not functioning, all the other windows are working correctly. Tia