Symptoms: Your car won't turn over, and the gadgets inside don't even light up

People see something electrical and thing it's automatically complicated. That couldn't be further from the truth. This is going to sound extremely simple, and that's because it is. Remove the electrical connections (there should be power wires and a harness connector), unbolt the brackets, and use the built-in tensioner to free the serpentine belt. That's it. Put the new one back in the way it came out, reconnect the wires, and boom, fire her up.