An owner’s manual is handy in locating the box in which the suspected fuse may exist.Īn easy way to test fuses is with a volt-meter. Often, there is one or more under the dash and another under the hood or in the trunk. There may be several fuse boxes or blocks in a vehicle. They show fuse amperage by the color of the fuse, and a number marked on the exposed face.įinding a blown fuse is not always easy. The fuse burns out at 20 amps, which is below the current that might damage the circuit. For instance, if a device normally draws 10 amps, a fuse roughly 20 amps in size might protect it. Engineers size fuses for about twice the normal current draw. They design a fuse to burn or blow out, at an amperage below the point where damage occurs in the circuit. How to check fusesįuses protect the electrical circuits on vehicles. Knowing how to check the basic electrical components can make auto repair easier. Electrical circuits are a much larger part of a modern vehicle.
Solving automotive problems often means diagnosing the electrical system.
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