Tips Sahabat

Causes of Car Light Bulbs Frequently Burning Out

09 April 2025
Bohlam Lampu Mobil Sering Putus

Has anyone ever experienced car light bulbs frequently burning out? Although it may seem trivial, this issue can be very annoying. Especially if it happens during a long journey and at night. 

Basically, a bulb burns out because the filament in the light is broken, causing no electrical current to flow. The car can still run well, but it is quite dangerous because there is no illumination. So what are the causes of car light bulbs frequently burning out? To find out, check the article below! 

Causes of Car Light Bulbs Frequently Burning Out

The process of filament breakage in a bulb does not happen just like that, but there are several factors that cause it. Here are the causes: 

1. Poor Quality Bulbs

Labels with cheap prices on bulbs that can shine brightly are indeed very tempting. Unfortunately, price does not guarantee the quality of a product, including car bulbs.

The bulb may indeed emit brighter light, but what about its durability? It’s pointless if you spend little money, but the bulb burns out quickly. In the end, you have to buy a new bulb again.

2. Overvoltage

Generally, the battery voltage in personal vehicles is only 12 Volts. However, when the engine is running, that voltage can suddenly spike to 14 Volts. As a result, the electrical system will also experience a voltage increase. 

The light will indeed appear brighter, but it can also break the filament in the bulb, especially in older car models. This is because newer injection-type cars are now equipped with a voltage stabilizer.

3. Due to Short Circuit

The presence of fuses in cars serves to protect the electrical circuit from various problems. When a short circuit occurs in the electrical system, the fuse will automatically blow.

The purpose of blowing the fuse is to prevent fires. However, this condition can also cause the car lights to go out. As a first step, try checking the fuse first before replacing the bulb.

4. Fuse Too Large

Just like those used in homes, fuses in cars also have different capacities. If the fuse capacity is too high, the electric current flowing to the light will also be greater.

If this condition occurs continuously, it will cause the filament in the bulb to break. Therefore, make sure you have installed the light fuse according to the recommended capacity. 

5. Melted Socket

There are no specific restrictions on installing overly bright bulbs. However, you must not forget that besides producing light, the bulb also generates heat. 

The brighter the light, the greater the electric current flowing and the heat energy produced. This condition can melt the socket and rubber seal, which are not very heat resistant.

As a result, the socket melts and makes the grip on the bulb less tight. In more severe cases, this condition can also cause terminal connections to loosen and trigger a short circuit.

6. Incorrect Installation Method

Installing a bulb in a car may seem very easy, just insert and twist. However, in reality, incorrect installation can be a cause of car light bulbs frequently burning out. 

For example, when you replace the bulb, you accidentally touch the bulb part. Not only will it leave marks on your hand, but oils and dirt will also stick to the bulb part. 

Read Also: Tips for Keeping Halogen Bulbs Durable

When the light is on, the dirt will accumulate, causing the heat on the bulb's surface to not spread evenly. In addition to causing the light to be dimmer, this condition also triggers the bulb to break.

If you lack experience with car electrical systems, it is best to leave this task to an expert or you can read information on our website. With a reliable mechanic, the issue of car light bulbs frequently burning out will be resolved well. 

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