A 2002 Bullet has AC lights that only operate when the engine runs, so skip those.
You have double checked the fuse & fuse holder? Mine disintegrated on all my Bullets. Napa saved the day.
Disconnect your battery. Put your VOM/Multimeter on resistance and read (+) to (-) on the battery leads. Switch OFF, it should be near "infinite" ohms.
Switch ON, it should be somewhere between 2 to 12 ohms which correlates to a current draw of 6A to 1A.
Your fuse is rated at 15A for fault duty. Point/coil are the "big" load, mine are usually 3A-5A depending on the coil type.
Resistances under 1 ohm are a good indication of a high resistance short, and less than that a dead short.
Read resistances as you poke & prod the wiring, move the forks left & right, etc., look for a deflection from the nominal 2-4 ohm level. If it's pegged at under 1 ohm, some (+) wire has managed to short to the frame or a black (-) wire in the harness or under seat.
Occasionally (rarely) the Reg/Reg can fail, but unplug it as a test check to see if that changes the readings.
Good Hunting - ACR -