as this truck is an electric (motive battery powered), it's "short" that is blowing fuses may not be a "short to -ground-" as much as a short between battery neg and battery positive,
That said the first step to isolating this problem, if it were me, would be to isolate the battery from the truck and check to insure there is no shorts of less than 100k ohm to the frame of the truck from any power cable.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.