Hello Miguel, usually in all the Fiat is placed the lower part of the radiator or in the water elbow, anyway by the manual test in these pages, clubdelfiat.com, bookaller.net, automecanico.com and redtectecnicaAutomotriz.com, you have to register but it is easy and free, I hope it helps you, a hug.
Thanks Karma .Vo you know that this Fiat model does not bring thermocontact in the radiator, anyway they solved it were the relay contacts that were sulfated means anyway I do not find the thermocontact According to the temperature, how much thank you very much