Stumped Turf Tiger will not turn over at all. Blows 20 amp fuse

[OrangeIron]

Replaced ignition switch and voltage regulator. Checked wiring harness and found no chaffing of wire loom. Found no damage to wire loom at all. Checked the clutch and ohms at 2.5 ohms. If i disconnect the loom going from main loom to the engine(coils, regulator, fuel solenoid) fuse will blow.