Dashcams (also known as car DVRs) are a relatively cheap way to protect yourself in case of an accident. Basically, they record video (and audio) constantly while you're driving. Usually, they start recording as soon as they receive power, and stop after they lose power. This works great in cars that have "switched" 12v accessory outlets, but the 2014 Fiesta's 12v outlets are powered all the time.

To get around the lack of switched power outlets in the Fiesta, we're going to tap into a circuit that is only powered when the car is on. There are many such circuits, but we will be using the windshield wiper circuit for this article.

Keep in mind that this tutorial can be used to semi-permanently install many different kinds of electronics, such as radar detectors and GPS navigation devices.

Here's a more in-depth description of dashcams:

A Beginner's Guide to Dashcam DVR Cameras

The one I'm installing in this article is the Mini 0801.

Update: Commenter fc321 says that you can use a 5 amp fuse for the dashcam, and still use a 20 amp fuse for the wiper blades.

Update: Commenter Noidea says that the European spec Fiesta ST has a completely different fuse box, but you can use the 15amp fuse for the rear wiper, and that the glove box requires more than pulling to remove.