My first geuss is the wirring going to the batt. You have no power to any thing so you have no connection. check the main cables with a multimeter, there should be continuity from pos. to neg. with the key on. That is a good place to start.
The good news is these bikes are very simple . so it shold be easy to track down.
CBR929-jardine race can, down 1, polished frame and swing arm,wheels polished, HELI bars, Sargent seat, Puig racing screen
commuting on a VLX600 shadow for now, 60MPG!!! I punched out the baffles, so it has that V-twin snap and crackle that made H/D so infamous. Except this little scute is rice powered!!lol