When an electrical part in your car stops working, learning how to take a fuse out of a car is often the first step to a quick and inexpensive fix. Locating and replacing a blown fuse is often the simple fix for an electrical component that has stopped working. This guide will walk you through the entire process, from finding the fuse box to safely removing the old fuse and installing a new one.
You do not need to be a mechanic. With a few basic tools and some careful attention, you can handle this task yourself in just a few minutes. It can save you a trip to the repair shop and give you a better understanding of your vehicle’s electrical system.
How To Take A Fuse Out Of A Car
This section covers the core procedure. The key is to work methodically and ensure you have the correct replacement fuse before you begin. Rushing or using the wrong part can lead to further electrical issues.
Tools And Materials You Will Need
Gathering your tools beforehand makes the job smoother. You likely already have most of these items at home.
- Your vehicle’s owner’s manual (crucial for the fuse diagram)
- A pair of fuse pullers (usually included in the fuse box lid or a basic automotive tool kit)
- A set of replacement fuses (matching the amperage ratings in your car)
- A flashlight or your phone’s light for better visibility
- A small container or bag to hold removed fuses
Step 1: Locate The Fuse Boxes
Most cars have two or more fuse boxes. The primary one is usually in the engine bay. A secondary, or interior, fuse panel is often found under the dashboard, near the driver’s side door, or in the glove compartment. Consult your owner’s manual for the exact locations in your specific model.
Common Fuse Box Locations
- Under the Hood: Look for a black plastic box near the battery or the firewall.
- Under the Dashboard: Check near the driver’s left knee panel or the side of the dashboard.
- Glove Compartment or Trunk: Some vehicles have additional fuse panels in these areas.
Step 2: Identify The Correct Fuse
Do not start pulling fuses at random. You need to find the specific fuse for the malfunctioning component. The owner’s manual contains a fuse map or diagram that lists each fuse by number and its protected circuit (e.g., “Radio,” “Power Windows,” “Cigarette Lighter”).
If you’ve lost your manual, you can often find the diagram printed on the inside of the fuse box lid. You can also search online for your car’s make, model, and year to find a digital copy of the fuse layout.
Step 3: Inspect The Fuse Visually
Before removal, it’s good to confirm the fuse is likely blown. Most modern blade fuses have a transparent plastic top. Look through this window at the metal strip inside. A good fuse will have an unbroken strip connecting the two metal blades. A blown fuse will have a visibly melted or severed strip. Sometimes the plastic may even be discolored or smoky.
Step 4: Safely Remove The Fuse
This is the central action. Ensure the car is turned completely off. While it’s generally safe, some circuits might be live even with the key out.
- Position your fuse puller over the fuse you need to remove. The puller’s plastic jaws are designed to grip the fuse without damaging it or the surrounding slots.
- Gently but firmly squeeze the puller and pull straight up. Avoid twisting or rocking the fuse, as this can damage the fuse box terminals.
- If you don’t have a fuse puller, you can use a pair of needle-nose pliers with extreme care. Be sure not to touch any other metal parts in the fuse box to prevent a short circuit.
Place the removed fuse in your small container. If it’s blown, keep it until you’ve confirmed the replacement works, just in case you need to double-check its amperage rating.
Step 5: Insert The New Fuse
This step is straightforward but requires precision. Take your new fuse and verify its amperage rating (e.g., 10A, 15A, 20A) matches the old one exactly. Never install a fuse with a higher amperage, as this can cause wiring damage or even a fire.
- Align the new fuse with the empty slot. The metal blades should slide smoothly into the clips.
- Using your fingers, press the fuse firmly and evenly down until it seats completely. You should not see any of the metal blades; the fuse should sit flush with the others.
- Do not force it. If it doesn’t go in easily, check the alignment.
Step 6: Test The Repair
Once the new fuse is installed, turn your car’s ignition to the “On” position (or start the engine, if necessary) and test the component that wasn’t working. Turn on the radio, operate the power window, or plug in the accessory. If it works, you’ve successfully completed the repair.
If the new fuse blows immediately, you have a deeper electrical problem, such as a short circuit in the wiring. In this case, it’s best to consult a professional mechanic.
Understanding Fuse Types And Ratings
Not all fuses are the same. Using the wrong type can be ineffective or dangerous. Here’s a brief overview of common automotive fuses.
Blade Fuses (ATO, ATC, Mini, Micro)
These are the standard in modern vehicles. They are color-coded by amperage for easy identification. For example, a 10-amp fuse is usually red, a 15-amp is blue, and a 20-amp is yellow. Always replace a fuse with one of the identical physical size and amperage.
Fuse Amperage And Color Coding
The amperage rating indicates the amount of current the fuse can handle before it blows to protect the circuit. The color is just a visual aid.
- 5A (Tan)
- 10A (Red)
- 15A (Blue)
- 20A (Yellow)
- 25A (White)
- 30A (Green)
What To Do If A Fuse Keeps Blowing
A single blown fuse is often a random event. However, if a new fuse blows quickly after installation, it signals an ongoing issue that needs diagnosis.
Common Causes Of Repeated Fuse Failure
- Faulty Component: The device on that circuit (like a motor or light) may be failing and drawing too much current.
- Short Circuit: Damaged or pinched wiring is causing a direct path to ground, creating a massive current surge.
- Overloading the Circuit: Plugging in too many accessories (like high-power inverters) into one outlet can exceed the circuit’s design.
Diagnosing these problems often requires a multimeter and wiring knowledge. If you’re not comfortable, seeking professional help is the safest course of action to prevent potential damage.
Safety Precautions And Best Practices
Working with electrical systems requires a cautious approach. Following these guidelines will keep you and your car’s electronics safe.
Always Disconnect Power When Possible
For maximum safety, especially when working on fuses related to airbags or major systems, disconnecting the negative battery terminal is advised. This ensures no current is flowing through the fuse boxes.
Use The Right Tools For The Job
The fuse puller is designed for a reason. It provides good grip and insulation. Using metal tools like screwdrivers or pliers increases the risk of slipping and causing a short across fuse terminals, which can damage the fuse box.
Keep Spare Fuses In Your Car
It’s a smart idea to keep a small assortment of common fuse amperages in your glove compartment. You never know when a fuse might blow, and having spares on hand can get you back on the road quickly. Many auto parts stores sell inexpensive multi-pack kits.
Frequently Asked Questions
Can I Use A Higher Amp Fuse If It Keeps Blowing?
No, you should never use a higher amp fuse. The fuse is a safety device calibrated to protect specific wires. Using a larger fuse allows more current to flow than the wiring can safely handle, which can lead to melted insulation, electrical fires, and serious damage. Always replace with the same amperage.
How Can I Tell If A Fuse Is Blown Without A Diagram?
You can visually inspect most blade fuses. Look for a broken metal strip inside the clear plastic body. You can also use a multimeter set to continuity mode. Touch the probes to the two metal tabs on top of the fuse; if it beeps or shows zero resistance, the fuse is good. No continuity means it’s blown.
Is It Safe To Remove A Fuse With The Car On?
It is not recommended. Always turn the car completely off before removing or installing fuses. Some circuits remain live with the key in the “off” position, and removing a fuse under load can cause a small arc, potentially damaging the fuse box connectors or startling you.
What Does It Mean If A Fuse Looks Fine But The Component Doesn’t Work?
Sometimes a fuse can fail without a visible break. This is rare but possible. The best way to check is with a multimeter for continuity. If the fuse tests good, then the problem lies elsewhere—like a faulty switch, a broken wire, or a malfunctioning component itself.
Where Is The Fuse Box In Most Cars?
Most cars have at least two. The main under-hood fuse box is typically near the battery. The interior fuse panel is commonly located under the dashboard on the driver’s side, behind a removable panel. Your owner’s manual is the definitive source for your specific vehicle’s layout, as there is some variation between makes and models.