Manual Toyota Hiace 1991 Diesel

Hello, I need the repair manual for a 1991 Toyota Hiace with a diesel engine. I'm primarily interested in the electrical diagrams because I need to repair the damage a butcher mechanic did to the wiring under the dashboard. But if anyone has the complete manual that describes the engine and everything, I would be very grateful. I know Toyota is very secretive with this information and it's very difficult to obtain; perhaps you could help others as well.