Manual Toyota Hiace 1991 Diesel

Hello, I need the mechanical manual for a 1991 Toyota Hiace with diesel engine, I am mainly interested in the electric diagrams because I must repair the damage caused by a butcher mechanic to the cables that go under the DASH. But if someone has the complete manual that describes motor and I appreciate them. I know that Toyota are very suspicious with information and is very difficult to get, maybe not only help me.