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What Are the Reasons for Repeated Blowing of Motorcycle Fuses?

1 Answers

Winter

07/30/25 6:33am

Here is a detailed introduction to the reasons for repeated blowing of motorcycle fuses: Damaged motorcycle rectifier: The main function of the motorcycle rectifier is to stabilize the voltage generated by the generator and then charge it into the motorcycle battery. Therefore, in addition to the generator wires, the rectifier also has the positive and negative battery wires. If the rectifier is damaged, it can cause a short circuit between the internal positive and negative wires, leading to the fuse blowing. Even if a new fuse is replaced, it will blow again. Faulty brake switch: A damaged brake switch can cause the fuse to blow frequently. Motorcycle brake switches have a small spring. When the brake pedal is pressed, the spring pulls out the iron rod inside the brake switch to connect the power supply. If the brake switch is damaged, causing the internal power supply to connect with the iron rod, the power will flow through the small spring and the motorcycle frame, resulting in a short circuit and blowing the fuse. Leakage in the motorcycle's wiring: After prolonged friction between the positive wire in the main harness and the metal part of the frame, a short circuit may occur, causing the fuse to blow.

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