how can i fix my fiat punto elec steering?

6 years ago i left the motor trade wihich i had been in for some 30 years, I now find my self living some 600 miles away from my daughter who has an electric steering fault on her 2000 fiat punto after putting the car in to several different garages that of which includes a fiat dealer i find my self being feed nothing but B---- S--- so it looks like i will have to solve the problem myself, if some person out there has a comprehensive wiring diagram would you please let me have a copy so that i can start an attempt to solve the problem.