How much do you want to know? I have an '81 CB750K and a Clymer shop manual. It does a pretty good job of explaining the major electrical components (ignition, lights) and then schematics showing the whole system.
If I had to find something that wasn't explicitly explained in the manual I would have to do some serious head scratching to work solely off of the schematics. But I do have some experience with wiring and reading schemos so I'm confident I could get by.
If you're not that confident in your wiring knowledge, start with an after market manual (Clymer, Haynes, etc) for your year bike. If that doesn't give you the detail you need, you might think about investing in a Honda shop manual which gives greater detail (I assume).
Regardless of what book(s) you buy, if you have a specific problem ping this forum with your issue giving as much detail as possible. Year, model, what's it doing, what did you expect it to do, what have you done, etc. There's plenty of dudes here (including myself) who enjoy challenges and are willing to give you some feedback to help solve your problem.
I'll give you plenty of advice, what the heck, I'm not using it!
Jimbo
'81 Honda CB750K
'74 Moto Guzzi Eldorado (LAPD)
'08 Kawasaki Nomad 1600