When non-metallic objects fall into a cigarette lighter or 12v accessory socket, you won't end up with a short circuit or ...

Your Car’s 12V Socket Doesn’t Work? ... while metallic objects can cause a short and blow its fuse. ... you will need a circuit tester to see if it receives power.

CARS.COM — If you have a 12-volt power outlet that suddenly ... fuse for the car’s power outlet has blown. A dead fuse for that circuit is ... by testing it with a voltmeter or circuit tester.