Yamaha Breeze 125 No Power - Won't Start!
The starter solenoid won't have anything to do with the lights not working. There are a few connections by the relays, you might check those for corrosion. I would also say that you might have a ground problem. I have a breeze but I don't have a manual for one, but the wiring is pretty basic, you should be able to remove the rear plastic and use a test light and find where the problem lies, just start at the battery and move to each connection to see if it has power. If you come across something that you think is bad, let me know and i can test mine and see if my results are the same or different.