Fuses are a key component in the function of an automobile, but many drivers do not understand how they work or what to do when one blows. In this post, we will explore automotive fuses and offer a guide for replacing them. We will also share some tips on how to avoid blowing your fuse. Let’s get started!
What is an automotive fuse, and what does it do?
An automotive fuse is a safety device that protects the wiring of an automotive electrical system. Fuses are designed to “blow” (open) when too much current flows through them, thus removing the short circuit or overload causing the excessive current flow.
Types of automotive fuses
There are two types of automotive fuses, but they work using the same principle, if there is too much current flowing through them, they will blow. There are blade-type fuses that you can find under the hood and interior fuse boxes located throughout your vehicle, and cartridge-type fuses that you can find inside your fuse box under the hood or inside the car.
How to check and change an automotive fuse
Some of these are very simple; for example, if you have a blown light bulb, replace the bulb. If the fuse still blows, it is possible that there is a short somewhere in that circuit. To find where the short is, you will need to use a multimeter and check for voltage without touching anything with your bare hands; if there is still voltage, then that means that there is a break somewhere in that circuit because electricity always takes the path of the least resistance. For example, it could be arcing through the air where it shouldn’t arc or through a wire somewhere that is corroded.
Cartridge fuses can be changed using a fuse puller which you can find at any auto parts store for less than $7 approximately. If you don’t have one and need to change one of those fuses, make sure the car is off and pull as hard as you can, but be careful as they are made of glass and can break. If the fuse is soldered in place, it will come out a little easier with a solder remover or by heating it up enough to melt the solder
Blade fuses can be removed with a flathead screwdriver; however, they usually have a locking mechanism on the side that requires you to push the top of the screwdriver towards you while pulling up at an angle. Once you do this, it should come out easily. Cartridge fuses are locked into place by a small plastic latch that needs to be pushed down before removing.
How to avoid blowing a fuse in the future
One of the most common reasons for blowing fuses is electrical components that are not working, for example, broken headlight bulbs, burned-out taillight bulbs, etc. The second most common reason is loose or corroded wire connections somewhere along the circuit.
Final thoughts on automotive fuses
Remember that when you find yourself in need of a replacement fuse, you need to check the amps on it first before buying one. That way, you don’t buy a fuse that is too big for your circuit and ends up burning out as the last one did. Remember that electrical fires are very dangerous, but if something does end up catching fire, then do not remove the source of fire which would be the fuse, instead remove its power source, which would be the car battery.
When it comes to automotive fuses, the best course of action is prevention. For any electrical system on a vehicle, from headlights and taillights to security systems, make sure everything is as up to date as possible with OEM parts from your local auto care center or retailer.
