Gary-
It sounds as if you have one or more faulty devices. The switch is activating your step cover control valve, but it may not be getting air so it can actually work. The step cover mechanism could also be jammed by loose components, misalignment, or debris.
Your dash fans may have a blown fuse or a bad switch, or some other calamity has befallen that circuit - a loose or corroded hot lead or ground connection or a bad relay. But since you see no fans, a previous owner may have removed them. That said, our coach has ports for upper dash air, not visible squirrel cage fans as many rigs have.
The 12v "lighter" outlet is commonly found in that location, and is supposedly convenient for GPS, CB, or any other 12v device as you wish. Just mind that a wire going to a device from down there doesn't interfere with your feet.
It is not uncommon for mirrors to get jammed such that the power mechanism cannot operate them. This could also be another case of a malfunctioning circuit.
Have a service facility check them, or get to a Beaver rally where experienced owners can help track down the causes. These should be relatively easy to resolve. And a rally is a superb place to have other owners help you understand your coach, by walking you through each system. The previous owner or dealer should have provided you a thorough walk through, but fellow club members may be your best bet for that now

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Joel