What are the common faults of car lighting insurance?

The common common insurance of automobile lighting is that the voltage is unstable and fused, resulting in the broken circuit lights not being electrified.

In normal use, the fuse will not be burned, unless there is a short circuit on the line. The failure caused by burning the insurance will depend on the insurance of the burning road, the insurance of the control circuit, the engine can not start, and the light insurance is just that the light is not on, which has nothing to do with the engine.

Common fuses are poorly wired and the contacts are loose, and when the large current passes, a large resistance and a high temperature are generated, which makes the bimetal sheet bend and deform and the contacts are separated, causing frequent tripping. Commonly, when the engine speed is high, the bimetal fuse will frequently jump open, and it will be hot when you touch the fuse; Removing the fuse and observing it reveals that the binding post wires and plastic pads are melted at high temperatures, as if they were soldered to the binding posts, and the bimetal contacts are ablated.

Precautions for maintenance of light fuseWhen driving at night, such as the fuse of 60A in the fuse box, the lights of the whole car will go out, and even the bulb will burn out. Generally, a 60A fuse is installed between the battery and the generator, if it is blown out, the generator will not be able to charge the battery; At the same time, when the speed of the generator rises and the voltage of the armature output current exceeds the rated value, the current cannot flow through the ignition switch through the voltage regulator to adjust the excitation voltage, and the current of the magnetization coil of the regulator is still provided by the battery. Because the voltage is only 12V, can not reach the working voltage of the magnetization coil of the regulator, so the excitation current is out of control, at this time the output voltage of the generator will increase with the speed, even up to 36V, will exceed the rated voltage used by the current several times, at this time the fuse is easy to ablate, must be connected to the 60A total fuse before driving, otherwise the safety is endangered.

The reason why the engine failure light is on could be poor fuel quality. It is estimated that most car owners have had this experience. As soon as I finished filling up the gas, the engine failure light on the dashboard of the car came on.

Most of the reasons are that the non-standard gas station is filled with inferior gasoline, resulting in insufficient combustion of the oil-gas mixture when the engine is working, and the engine fault light is on. This will not affect driving safety, but it will cause more or less damage to the engine.

Or the uneven quality of fuel in the market, urban traffic congestion, it is very easy to cause carbon deposition in the spark plug of the car, and the carbon deposition of the spark plug will affect the poor work of the engine, resulting in difficult starting, unstable idling, poor acceleration, rapid tempering of refueling, excessive exhaust volume, increased fuel consumption and other undesirable phenomena.

It is possible that the lack of cylinders in the engine will affect the fuel consumption of the car, black smoke, weak acceleration, violent shaking and vibration, and the noise of the engine may also increase, and the car is easy to stall. The ignition system and fuel supply system are the key factors that cause the engine to lack cylinders.

The engine fault light does not mean that the engine cannot work, and it is best to go to the repair shop in time to check and maintain. When the engine fault light is on, first check the water temperature gauge and oil pressure warning light. If the water temperature gauge and oil pressure warning light do not alarm, the car can continue to drive, but at this time, you must pay attention to controlling the speed of the car and drive to the repair shop in time for inspection.

If the water temperature is too high or the oil pressure warning light is on, you should immediately pull over and ask the repair shop for help.

You should be the vehicle after a long time parked, the vehicle's battery is insufficient, the vehicle's battery is insufficient, after the ignition starts, these fault lights are lit up, if it is not a long-distance drive, it can run, or drive to your local brand battery store, to charge the vehicle's battery. When the battery is fully charged, re-ignite.

1. The quality of automobile fuel is unqualified.

If the engine fault light on the dashboard of the car is on shortly after the vehicle is refueled, then it is generally because the oil is not added correctly, the quality is poor, and it is not up to standard, which leads to insufficient combustion of the oil-gas mixture when the engine is working. This may not affect driving safety, but it will cause some damage to the engine.

2. Oxygen sensor failure.

At present, there are generally two oxygen sensors installed on the car, one before and after the three-way catalytic converter, which is used to detect the air-fuel ratio of the engine under different working conditions, and at the same time, the front is to provide a signal for the ECU driving computer to adjust the amount of fuel injection and calculate the ignition time. The latter is used to test the working quality of the three-way catalytic converter. If there is a problem with one of them, or if the plug is damaged or loose, it will cause the mixture to be too thin or too thick, and the engine failure light will also come on.

3. The air flow sensor is faulty.

If the air flow sensor is not working properly, the ECU will not get the correct air intake signal, and the problems will be similar to the above, and the engine will not run properly.

4. Carbon deposition in spark plugs.

Carbon deposits in the spark plug will cause abnormal phenomena such as difficulty in starting, unstable idling, excessive exhaust gas, and increased fuel consumption, and the engine fault light will also be on.

5. Engine knocking.

If there is a knock in the vehicle, the vehicle will be weak and noisy, and in severe cases, there will be a sound of cylinder knocking. At this time, the vehicle's engine fault light will also turn on.

6. The water temperature sensor is damaged.

If the water temperature sensor is damaged, the air-fuel ratio will become thinner or thicker, which will cause the engine to work abnormally and cause the engine failure light to turn on.

7. The engine lacks cylinders.

After the engine lacks cylinders, the vehicle will have large fuel consumption, black smoke, weak car acceleration, serious shaking, and increased engine noise.

Hello, I am very happy to answer for you, the car headlight fuse is constant, and the constant electricity refers to the positive power supply that is not controlled by any switch or relay from the positive pole of the battery, that is, as long as the battery has electricity, the insurance is not burned, there is electricity! Generally, there are two fuse boxes on the car, one is responsible for the safety of the external electrical appliances of the car, such as the safety protection of ECU, glass water, lights, horns, ABS and other circuits, which is located in the engine compartment; The other one is responsible for the normal operation of the electrical appliances in the car, such as cigarette lighters, window lifts, electric round beam moving seats and airbags, etc., which are generally located on the left side of the steering wheel. Many fuses need to realize the function of orange leakage of the vehicle when it is not started, such as anti-theft system, remote control system, security system, etc., so many of them are constant electricity.

In use, poor fuse wiring and poor contact are common. When a large current is passed, a large resistance and a higher temperature will be generated, causing the bimetal to bend and deform while the contacts are separated, causing frequent tripping. When the engine speed is high, the bimetal fuse will frequently and automatically trip, and it will heat up when it touches the fuse.

When the fuse is removed, it can be found that the wires and plastic pads of the terminals are melted at high temperatures, and the bimetallic contacts are ablated, just like the soldering on the terminals.

Precautions for lighting fuse maintenance: When driving at night, if the fuse within 60A of the fuse box is blown, the lights of the whole car will go out or even the bulb will burn out. In general, there is a 60A fuse between the battery and the generator.

If it burns out, the generator will not be able to charge the battery. At the same time, when the speed of the generator rises and the voltage of the output current of the armature exceeds the rated value of the car, the current cannot flow through the voltage regulator, and the excitation voltage is adjusted through the ignition switch. At this time, the current of the magnetizing coil of the regulator is still supplied by the battery.

Because the voltage is only 12V, it cannot reach the working voltage of the magnetizing coil of the regulator, so the excitation current is out of control. At this time, the output voltage of the generator increases with the increase in speed and even reaches 36V, which will be several times higher than the rated voltage used by the current. At this time, the fuse is easy to ablate, and the 60A main fuse needs to be connected before driving, otherwise the safety will be endangered.

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A light protector can protect the circuit when the light is broken, but the light protector will inevitably break. What are the common faults of automotive light protectors? The following is a brief introduction to the common faults and functions of automotive lighting safety devices:

Functions of photoprotectors] 20A bimetallic current fuses are commonly used in automobiles. When the headlamp, liquid dissipation headlamp, and rear lamp are short-circuited, the fuse will automatically cut off the power supply to protect the circuit from being burned out. The bimetal fuse is made by pressing two bimetal sheets with different expansion coefficients.

It is the main protection device against overload and short circuit in the electrical system, it is bent by heat when the current is high, so that the contacts are separated and the circuit is cut off. 【Lighting Fuse Common Troubleshooting】Some vehicles are also equipped with four or ten fuse boxes. Each fuse controls the maximum current of its own line.

Once a fuse blows, it is necessary to find out the ground fault in the group of lines, and then connect the fuse to protect the safety of the entire line. Ablation of the bimetallic contacts will result in non-charging. When the speed is slightly higher, the current generated by the generator gradually increases through the regulator.

At this time, the contact current will increase, the contact will heat up, the bimetal sheet will bend and deform and automatically trip, and the charging current will be cut off without charging. Or the phenomenon of contact when there is contact or contact when there is contact will cause the failure of unstable charging. In the use of ordinary fuses, poor wiring, poor contact, and large currents pass through, large resistance and high temperature are generated, which makes the bimetal bent and deformed, and the contacts are separated, resulting in frequent tripping.

When the engine speed is high, the bimetallic digging fuse will frequently and automatically jump open, and it will heat up when it touches the fuse. When the fuse is removed, it can be found that the conductors and plastic pads of the terminals are melted at high temperatures, and the bimetallic contacts are ablated as if they were soldered to the terminals. Remove oxide from the binding posts and contacts on the fuse, reinstall according to specifications, and troubleshoot.

The bimetallic fuse is connected to the circuit through two contacts. Once the contacts are loose or ablative, it may cause poor contact, causing the circuit to work abnormally, and the contact temperature will rise abnormally when the power is on. When driving at night, if the fuse of 60A in the fuse box is blown, the lights of the whole car will go out, and even the light bulb will be burned out.

If the charging capacity of the generator is too large, the generator regulator should be adjusted according to the technical specifications. In vehicle use, fuse blowing is one of the common faults and must be repaired in time. Regularly maintain, adjust, and overhaul lighting safety devices, and replace them with new ones if necessary, so that the safety (fuse) devices can really play a role in protecting the electrical system.

The bulb failure light on the dashboard indicates that the car has a damaged bulb, including brake lights or inconspicuous license plate lights, width indicators, and reversing lights. In addition to the possibility of damage to the bulb, it is also possible that the lamp is not connected. Check which light is not on, and you can easily find the fault point.

Turn signals, brake lights, license plate lights, width indicators, front and rear fog lights, reversing lights, shouting low beams, low beams, etc.

If all the lights have been tested and there is no problem, but the faulty lights are still on, there are several possibilities:

1.There is a place where the line is virtually connected, the negative value of the lighting line is too large, and the instrument computer mistakenly thinks that the bulb is not normal.

2.Poor line contact.

3.The filament of the bulb seems to be broken, but it is not. When the alarm light is on, you can also try to resist the next method of ridge infiltration

Park the car in a safe place, turn off the engine, remove the negative battery cable with a wrench, wait 15 seconds before installation, and see if the fault light disappears. Millions of car purchase subsidies.

The common faulty lights of the car are:

1. Engine fault light: When we see the engine fault light on the car lights up, it means that the engine of the car is faulty, and this kind of fault is generally very serious;

2. Battery indicator: In the process of car driving, the battery is a main function, if there is a problem with this function, then it will cause problems in car driving.

4. Abnormal warning light of brake disc: Once the abnormal warning light of the brake disc is lit when driving, it means that the brake disc of your car is very worn, or there is a big problem with the sensor;

5. Brake system warning light: Once our car finds that the brake system warning light is on, it means that your car system is faulty, or the brake fluid is insufficient;

High-configuration car, it should be the steering auxiliary filament next to the headlights burned, I burn one a year. After buying a good OSRAM for H7, open it for a period of time, and the alarm will disappear automatically.