89TRX 350D NO Key Switch Power ?

I gave up and took my TRX 350 D to the local Honda dealer to fix a no spark condition last fall. They found a bodged electrical "fix" when the PO installed a horn and license plate light, well after running great since then, after returning from a week away I went to start it, Nothing ? Battery reads over 12v on meter. When I turn key switch on, no lights at all ? It’s in neutral, headlight works fine, I checked connection at battery. When I parked it, it ran perfect ? This is a great little machine but the electrical issues are troubling. Thanks for any suggestions