If the fuses are all still working, there is likely a more serious problem and it may be time to call on an expert. If the current draw excedes 5 amps (for an amount of time that excedes the fuse’s limit), then the fuse will interrupt the circuit. If a device is not working, you should test the fuses. First, a 5 amp fuse is meant to withstand a 5 amp current draw for an amount of time determined by the type of fuse, fast or slow blow. However, some fuses will create that blackened stain after only slightly overheating, and that may have even been the result of an unnoticed incident weeks or months earlier. If the translucent area is blackened, it is usually because the fuse has burned out. They are made clear so that you can see if the wire remains intact.
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