Why Can't the Car Window Roll Up?

What does p/outlet fuse mean?

p/outlet refers to the front panel cigarette lighter socket fuse. Here are some related introductions about car cigarette lighters: 1. Differences: The power supply for small cars is generally DC 12V (may vary for different models), with the central elastic head as the positive pole and the two side clips (ears) as the negative pole. It is directly connected to the car battery, with the same current and power as the battery. 2. Uses: The car cigarette lighter is an electronic device similar to a multi-hole power socket for household use. It connects to the car power supply through a plug and then extends multiple cigarette lighter ports. The cigarette lighter socket is very useful for car owners who frequently use car electronics, such as charging mobile phones, MP3/MP4, and other digital products. In addition to providing a lighter, the car cigarette lighter can also be equipped with a car inverter, which can convert the car's 12V, 24V, or 48V DC power into 220V/50Hz AC power for ordinary electrical appliances. It is best to use a split-type car inverter, with the power of the electrical appliance limited to below 150W, and the output current not exceeding the battery current.

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What is the content of Subject 4 exam?

Subject 4, also known as Subject 4 theoretical test or driver's theoretical test, is part of the motor vehicle driver's license assessment. The main contents include: safety and civilized driving operation requirements, safe driving knowledge under adverse weather and complex road conditions, emergency handling methods for situations such as tire blowouts, and knowledge of post-traffic accident handling. The Subject 4 exam consists of 50 questions, presented in the form of cases, pictures, animations, etc. The total score is 100 points, with a passing score of 90. After the implementation of the Ministry of Public Security's Order No. 123, the Subject 3 exam was divided into two parts: the road test and an additional safety and civilized driving knowledge test, commonly known as "Subject 4," which assesses "driving ethics." Since this test is conducted after Subject 3, it is commonly referred to as the Subject 4 exam. Officially, there is no such term as Subject 4. Before the exam, students can study traffic regulations through driver's mock exam software on mobile devices or computers.

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What does R20 in tires mean?

Tire R20 refers to the diameter of the wheel rim being 20 inches. Here is some extended information: 1. Wheel rim size: The size of the wheel rim generally refers to the diameter of the wheel rim. The larger the wheel rim size, the higher the aspect ratio of the tire, and the better the handling stability of the car. However, the larger the contact area between the tire and the ground, the greater the resistance when the car is moving, and the more fuel it consumes. To ensure driving safety, each type of tire must use an appropriate wheel rim. 2. Wheel rim offset: The wheel rim also has other parameter values, such as the wheel rim offset, which is the ET value. The wheel rim offset refers to the distance from the centerline of the wheel rim to the mounting surface. The smaller the offset, the more the wheel rim will protrude out of the car after installation. When replacing a new wheel rim, it is also important to note that if the offset of the new wheel rim is larger than that of the original wheel rim, or if the width is too large, there may be friction with the vehicle's suspension system.

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Is the Subject 3 of C2 License Test Easy?

In the C2 driver's license test, Subject 3 is relatively difficult. For the C2 license examination, the pass rates for Subject 1 and Subject 4 are relatively high, approximately 93.75% and 91.12% respectively. However, the pass rates for Subject 2 and Subject 3 are much lower, around 71.88% and 78.10%. The basic items tested in Subject 3 include: Vehicle preparation, starting, driving in a straight line, changing lanes, passing through intersections, pulling over, crossing pedestrian crosswalks, passing through school zones, passing bus stops, meeting oncoming vehicles, overtaking, making U-turns, and nighttime driving. The test procedure consists of: walking around the vehicle for inspection, preparing to drive, starting the vehicle, and pulling over. According to regulations, holders of a C2 driver's license are permitted to drive small and mini automatic passenger vehicles, as well as light and mini automatic cargo vehicles. Specifically, small automatic vehicles refer to those with a total mass not exceeding 4.5 tons, seating no more than 9 people, and with a vehicle length not exceeding 6 meters.

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Why Does a Car Battery Get Hot?

Here are the reasons why a car battery gets hot: 1. Battery issues: Aging of the battery, increased internal resistance, dried-out electrolyte, or internal short circuits can cause overheating. As the battery is used more frequently, including during discharge and charge cycles, water molecules within the battery gradually deplete, leading to gas emission and water loss. This results in heat generation during electrochemical reactions. 2. Battery aging problem: If the battery has been in use for two years or more, thermal runaway may occur due to the battery's inherent quality or usage conditions. A specific symptom is the charger not switching to a green light even after overnight charging. The battery, suffering from water loss, enters thermal runaway, which severely damages the battery. If the battery has been in use for over 18 months, it is generally advisable to replace it, as adding water for repair has limited effectiveness. 3. Charger problem: Standard chargers lack pulse functionality and do not have negative pulse depolarization features. Such chargers often fail to maintain a constant voltage in the later stages of charging, causing the battery voltage to exceed permissible limits. This leads to excessive gas emission, water loss, and overheating.

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Why does the reversing camera show a blue screen when reversing?

The reason why the reversing camera shows a blue screen when reversing is: the camera or video line is faulty. The reversing camera consists of a wide-angle camera, a control unit for transmitting signals, an MMI display, an information display control unit, a TV tuner, and a CAN data coordination bus. Its function is to allow the driver to see the situation behind the vehicle on the display when reversing, ensuring the safety of reversing. Methods for viewing the reversing camera: 1. The green line in the reversing camera generally indicates that the rear of the car is 2m away from the position shown by the green line, allowing for a U-turn or continued reversing; 2. The yellow line in the reversing camera represents that the parking space is 0.7 to 1m away from the position shown by the yellow line, requiring attention to deceleration; 3. When the red line in the reversing camera is about to touch the obstacle, the car must be stopped, as the position represented by the red line is only 30cm away from the rear of the car.

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Why Can't the Car Window Roll Up?

What does p/outlet fuse mean?

What is the content of Subject 4 exam?

What does R20 in tires mean?

Is the Subject 3 of C2 License Test Easy?

Why Does a Car Battery Get Hot?

Why does the reversing camera show a blue screen when reversing?

Reasons for the Car Stalling Immediately After Starting?

How to Deal with Excessive Vehicle Exhaust Emissions?

Must the Car Battery Be Replaced After Being Drained?

What are the precautions for driving in high summer temperatures?