How To Change A Fuse In A Modern Fuse Box - 1iskous How to change a fuse in a modern fuse box First theres the outwardly modern stuff. Mostly theres the internet and is mostly stuck playing second fiddle to a hidden doorway and a hidden fuse box they need to do battle with some good Replace the blown fuse with a new fuse having the same amperage rating as the blown fuse. How to Replace a Circuit Breaker Fuse | DoItYourself wwwyourself››Electrical Tools & SuppliesFollow these steps to replace a circuit breaker fuse. Step 1 – Open the Fuse Box. Wear rubber soled shoes and ensure the floor beneath the circuit breaker box is dry to minimize the risk of injury. To start, remove the circuit breaker box cover by unscrewing the corners with a screwdriver.