Hi from 39 N., 77W. My pen name is DIY.
In the US the sources are Haynes/Chilton books for (partial) schematics, factory service manuals for hundreds of dollars, and maybe you can find something online.
Does the odometer not count up or is just dead?
For your specific need, an hour spent pulling and replacing fuses might give you enough info, but messing with a car is not without the risk of making more problems.
Welcome, and good luck.