If you're still having trouble locating the exact point at which the fuse blows ----- wire a high wattage filament lamp, solder both filaments of a headlamp bulb together will give 100+ watts ( not wimpy LED ) in place of the fuse --- the motor will still run, but slowly & lamp ( bulb ) will glow at full brilliance once the fault/dead short is reached & motor should stop at that point.