How to Remove and Replace an Old Fuse Box | DoItYourself wwwyourself››Home AutomationStep 2 - Remove the Old Fuse Box. You will need to ensure that all of the power is completely shut down before you proceed. Take the lid off of the fuse box, and then remove all of the fuses using your screwdriver. Unhook the wires using a pair of pliers, and leave them in place. unscrew the fuse box from the wall, and remove. How To Repair a Fuse in a Fuse Box | 24|7 Home Rescue How To Change A Fuse in a Fuse Box. Turn the main fuse box off. You can usually do so by turning the main power switch to the ‘off’ position. Open the cover that protects the fuse carriers, or remove this cover. Take out the fuse carriers and inspect them to determine which one is the broken fuse.