Is both ends visible? If so you could splice in a piece of new wire.
As far as finding the wire on either end by using the color that is showing at the break, might be tough. Factory is not know for following thru with the same color wire from one end of the job to the other.
Schematics? They almost unheard of. Al tho, you could call the factory and see if they would be of any help.
2008 Cruiser CF26RK
2013 Ford Eco-Boost
Heavy duty payload - Max tow