Have a 1995 Oakwood mobile home hot water wiring is not working on hot water heater need to know where the cross over box is located. Need schematics of mobile home please help. Electrician needs this to run knew wire to hot water heater.

Even if you could find a schematic (doubtful) it will typically not show the location of junction boxes etc.
I am curious as to why an electrician would need a schematic to run a new wire.

The splice box is usually located underneath where the 2 halves join.
If you have a scuddle hole in the ceiling, it could also be there.
Running new from Panel is not a bad Idea, but It still could just be a connection in the box. Also, finding the box allow you to only replace the bad half.