well i guess it all depends on the tech and the infomation he has at hand on wether he uses his laptop plugging into the truck or not.
I myself rarely have to unless it is something i just cant find otherwise.
Most of the time anything i've found wrong is usually a connection or a fuse or something like that.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.