Did a couple quick searches and didn't find any solid threads with diagrams. So I am going to post up as many as I can. I will start with engine performance and starting/charging. I will keep adding more upon request, and when I have the time. So pm me if you need a certain diagram for a certain system. I will try to upload the complete set of diagrams for the entire vehicle.
Some diagrams may not come out in the best quality. If you need one and can't read it on here let me know and I can email it.
All these diagrams are for 2013 abarth.
Admin Note: Photobucket pulled third party image support which pretty much has wrecked the internet. However, we have a member who has uploaded the wiring diagrams for us in the quote below: