Mike is right. The diagram shows the stock acc. kit (horn flashers and headlights) all go through a fuse block that is wired directly from the battery. Your lights should have a 15 amp fuse in the fuse block between the battery and the key switch.
That's the ezgo info. If yours is aftermarket the fuse size may vary w/light wattage.
http://www.buggiesgonewild.com/ezgo-gas-tech/
The diagrams are in the technicians manual. Good Luck