Which car fuse causes a complete power loss when blown?

[DeAlexander]

Car main fuse blown causes complete power loss. Function of fuses: Fuses are concentrated in one place, which is called the fuse box. Generally, vehicles have two fuse boxes. One is located inside the engine compartment, and the other is located on the left side of the steering wheel or inside the glove box. Car fuses are a type of current fuse; when the circuit current exceeds twice the rated current of the fuse, it will blow within seconds, serving the purpose of circuit protection. They are commonly used for overcurrent protection in car circuits and also for overcurrent protection in industrial equipment. Classification of fuses: Car fuses can be divided into three types: blade fuses, bolt-down fuses, and automotive glass tube fuses.

[MacAdaline]

In our 20 years of auto repair, this is the most common issue we encounter. When the main fuse blows, the entire vehicle goes black instantly—professionally termed as the main fuse or master fuse. It's positioned right next to the positive terminal of the battery, resembling an oversized metal strip. If you turn the key and get no response, the dashboard stays dark, and even the anti-theft light doesn’t illuminate, there’s an 80% chance it’s blown. Last time, my apprentice was replacing the battery, and when the wrench touched the positive terminal, there was a loud ‘pop’ with sparks flying everywhere—suddenly, the whole workshop went pitch black. Veteran drivers should take note: if this fuse blows, never force-start the vehicle. First, check for any short circuits. If you have a multimeter, measure the battery voltage—a reading above 12V indicates the fuse has blown. When replacing it, carefully insulate the surrounding wires with electrical tape, treating it as meticulously as a surgeon performing an operation.

[DelKimberly]

Anyone in the electrical field knows that the main fuse is the lifeline of a vehicle's circuit. It's typically connected in series on the positive battery line, with specifications ranging from 80A to 300A. The other day, a modified car broke down, and upon opening the battery cover, the main fuse was found blown into two pieces. This phenomenon is often caused by a short circuit, such as haphazard wiring during audio system modifications or a malfunctioning voltage regulator in the alternator leading to a current surge. Here's a tip: when the fuse blows, the battery terminals will feel hot to the touch. Nowadays, many new cars hide this fuse deep inside the engine compartment's fuse box, requiring the removal of three screws to access it. Always disconnect the negative terminal before replacing the fuse, handling it as carefully as if defusing a bomb.

[StBraxton]

A veteran taxi driver with 15 years of experience tells you: A complete power failure in the car is 80% likely due to a blown main fuse. It's usually located near the battery, resembling a credit card-sized metal piece. The weirdest scenario is when the car suddenly loses all power on the highway during rain, and you can't even close the windows. I always keep three sizes of main fuse pieces in my car; replacing them myself takes just five minutes. Key point: Check if the wiring has been gnawed by rats. Last month, a Bao Lai's battery cable was chewed to expose the copper wires, and the new fuse burned out instantly. In emergencies, you can wrap copper wire around it twice as a temporary fix, but don't drive more than five kilometers like that. Newer models are even more troublesome—replacing the main fuse requires reprogramming the computer system.