Hi
Go to the thread below & in on of my posts in the thread is a link to the 244 02-06 eLearn, just follow the instructions in the post to extract, burn & install it on your system. The last post in the same thread also has a link to the older DTE version manual as well but the eLearn is easier to use & more up to date. https://www.fiatforum.com/ducato/241490-ducato-wiring-diagram.html?p=3157060
Cheers