F111 is for the secondary flashers I think, try unplugging J107 and see if it persists. Could be a bad bulb or shorted socket, taking them out of the circuit first can eliminate them, or point to them if it doesn't blow while they are disconnected.
PS - Game OFF when plugging/unplugging the connector
+1
If the fuse blows with the J107 connector removed, then it will be the driver board - more specifically the Bridge Rectifier BR4
