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Many car owners may never have to deal with a blown fuse, but knowing how to handle this situation can transform a frustrating experience into a minor inconvenience. Your car has dozens of fuses, so there are plenty of opportunities for something to go wrong. A blown fuse can shut down the radio, make the power windows inoperable, or cause the lights to go dark. In some cases, a faulty fuse can leave you stranded.
Even if you’re inclined to head to the mechanic at the slightest car trouble, understanding how to change a fuse is an essential DIY maintenance task. It’s no different than knowing how to add oil or check presión de llanta. Changing a fuse on your own will save time and money and doesn’t require much effort or master mechanic-level skills.
Keep reading as we walk you through what’s involved in changing a car fuse.
In simple terms, car fuses safeguard your vehicle’s sistema eléctrico. These small, plastic components are designed to absorb the brunt of any electrical current that exceeds normal levels. The idea is that it’s far cheaper and easier to replace an inexpensive fuse than the sensitive and costly component it’s protecting in the event of an electrical spike.
Modern vehicles can have up to 100 fuses, which makes sense considering how much technology is packed into today’s cars. All the computers, sensors, advanced safety equipment, and infotainment gear require electricity, underscoring the importance of the protection offered by fuses.
Most contemporary automobiles rely on blade-type fuses, with variations in size and amperage. These fuse types have been around since the 1970s and incorporate two flat metal prongs connected by a thin metal safety strip and joined by a translucent plastic housing. Most automotive fuses range from 1 to 50 amps (amperage), but large vehicles, like trucks and buses, can have fuses that range up to 120 amps. Fuses are identified by an amperage rating on the top (for instance, ‘10’ indicates a 10-amp fuse) and different color plastic housings. Blade fuses can come in various sizes, depending on the systems they protect.
Always replace a damaged fuse with one of identical amperage and size. Never substitute a defective fuse for one with a different amperage rating.
While older or specialty vehicles may use different fuse types, we’ll focus on blade fuses, which are present in most cars today.
The first sign of a blown fuse doesn’t usually come from inspecting the fuse box. Usually, there are other initial symptoms to be aware of. Be on the alert for:
With one or more of these symptoms present, you’ll want to open your car’s fuse box (see below for locating the fuse box) and begin a visual inspection. Look for:
A working fuse contains a thin metal safety strip visible through its transparent housing. In a blown fuse, this strip appears broken or darkened. Many modern fuses feature a small window on top that turns dark when the fuse fails, making identification even easier. Some luxury vehicles even include electronic fuse monitoring that alerts you through the dashboard display when a fuse requires replacement.
Most vehicles have two or more fuse boxes: one under the hood for major engine components and another inside the cabin for interior electronics. Some larger vehicles or luxury models might have additional fuse boxes for specialized systems.
The under-the-hood fuse box is usually located near the battery and protected by a weather-resistant cover. It often contains fuses that protect high-drain systems, such as the powertrain management system, the cooling fans, the fuel pump, y el charging system.
The cabin fuse box is usually part of or adjacent to the dashboard. It might be under the steering wheel, in the glove box, or beneath a panel near the instrument panel. These fuses cover power windows and locks, the radio or infotainment system, climate control, interior lighting, and accessory power outlets.
The owner’s manual will provide fuse box locations and a detailed diagram of the individual fuses and their functionality. If the manual isn’t available, you can locate fuse box information online; just be sure to use a reliable source (like the manufacturer’s website). Alternatively, some automakers include a simplified fuse diagram inside the fuse box cover for quick reference.
While multiple steps are involved in replacing a car fuse, they’re not overwhelming for most drivers. Here’s a checklist to follow:
Although the actual process of replacing a blown fuse is straightforward, there are numerous safety considerations. It’s no different than being cautious around electricity in your home. Here are essential safety tips to follow when working with car fuses:
Electrical issues that go beyond replacing a fuse often involve significant auto repairs. An extended car warranty (also called a vehicle service contract), like several plans offered by Endurance, protects against expensive electrical system repairs.
Several Planes de protección automática Endurance provide coverage for electrical components, including:
Most Endurance Warranty plans cover essential electrical components, with options available for more complex systems. Endurance customers enjoy numerous benefits, including:
All plans include a year of Beneficios de élite. Just pay a small activation fee for access to up to $2,000 of valuable services such as tire repairs and replacements, key fob replacement, collision repair discounts, and total loss protection.*
Discover all the advantages of Endurance Warranty by Solicitar presupuesto GRATIS or visiting the Tienda online Endurance for instant plan recommendations and pricing. Call an Endurance advisor at (800) 253-8203 para asistencia personalizada.
Revisar la Blog Endurance for insightful articles on car repairs, DIY advice, auto reviews, and more.
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Al hacer clic en el botón, acepta que Endurance utilice tecnología automatizada para llamarlo, enviarle un correo electrónico y enviarle mensajes de texto utilizando la información de contacto anterior, incluido su número de teléfono móvil, si se proporciona, con respecto a la protección del automóvil o, en California, el seguro contra averías mecánicas. También acepta el Endurance política de privacidad y Términos y condiciones. El consentimiento no es una condición de compra y puede retirar el consentimiento en cualquier momento. Se pueden aplicar tarifas por mensajes y datos.
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Como veterano del ejército y propietario de un taller de reparación certificado por ASE, Andrew ha hecho de la educación del conductor moderno una misión constante desde la apertura de su taller de reparación. Autospa de la ciudad del medio oeste, en 2012. Leer más Acerca de Andrew.