Is there a certain position the electrical ignition switch for 1994 Explorer has to be set key cylinder work properly?

The ignition switch in a 1994 Ford Explorer needs to be in the "Run" position (sometimes denoted by a picture of a car driving) for the key cylinder to function properly in most situations. This is the position where power is supplied to the various components necessary for starting and running the vehicle. The cylinder itself will likely be mechanically locked in other positions (like "Accessory" or "Lock"). If the cylinder is not turning freely, it likely has a separate issue beyond just the ignition switch position.