Multiecuscan

Will be using a Windows laptop. Have this cable I got years ago for some diagnostic program I've long forgotten about,



will it work and If not, what is recommended here? Will I also need a yellow adapter cable or bluetooth adapter. Working U.S. model Fiat.

I highly doubt that this cable will work.

Get an Cantiecar or ELM cable, when you have a good adapter and connection between your car it is worth its weight in gold.

I also have a VAGCOM cable for VW/Audi and this cable for Ford/Mazda used with Forscan,

You can check what adapter works with your car here: https://www.multiecuscan.net/VehicleSupportCheck.aspx