How To Fix Frequent Blown Fuses On Walk-behind Pallet Truck

Constantly blown fuses on the Walk-behind Full Electric Pallet Truck cannot be solved simply by replacing fuses. Without fixing root causes, fuses will burn out more often, delaying work and raising maintenance costs. The two core triggers are short circuits and excessive current overload. Follow these steps for fast troubleshooting.

Two Fault Categories

Fuse blows immediately after power-on: Hard short circuit Causes include worn main wiring touching the frame, broken MOS tubes inside the controller, or positive-negative wire contact. Never install a higher-rated fuse, as it will burn the whole wiring harness.

Fuse only blows when driving with no-load normal: Overload failure Motor winding short circuit, jammed gearbox or seized bearings lead to startup current far exceeding the rated value and blow fuses.

Step-by-step Inspection

Unplug the drive motor connector and power on again

Fuse stops blowing: Fault lies in the motor or motor wiring;

Fuse still blows instantly: Defects exist in main cables, contactors or damaged controller.

Inspect the full wiring harness Focus on wire holes and sharp frame edges. Worn cable insulation creates positive-to-ground short circuits. Water and moisture also cause leakage and short faults.

Test the controller Burnt internal CURTIS MOS tubes create direct positive-negative conduction. Use a multimeter to check power terminals; continuous conduction means the controller needs repair or replacement.

Check motor machinery and windings Manually spin the motor shaft. Stiff rotation means excessive mechanical resistance and surging startup current. Test winding insulation to ground; conduction indicates damaged windings shorted to metal.

If you wonder How To Fix Frequent Blown Fuses On Walk-behind Pallet Truck, follow this inspection guide to eliminate repeated fuse failure, cut repair costs and avoid production downtime.