Unfortunately, I don’t have any data for that. That fuse most likely supplies power to the front running lights also. The rear license plate light is a pretty good possible suspect, where the wiring runs between the body and the rear door. Hopefully the trouble is happening all the time and isn’t an intermittent problem, which would really make it difficult to find.
If the trouble is constant you can use an ohmmeter to monitor the protected side of the fuse position contact and ground to watch the resistance change as you disconnect various harness connections and watch the resistance changes. You can also substitute the fuse with a brake light bulb wired across a blown fuse and watch the light intensity change when the short is removed, the light will dim when the short is disconnected from the circuit as the current will drop.