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What is the problem when the brake light does not work?

1 Answers
LaylaLee
07/29/25 7:52pm
The main reasons why the brake light does not work are as follows: 1. The brake light bulb is damaged. Since the bulb is used frequently, you can replace it with a new brake light bulb. Alternatively, check for poor contact and adjust the bulb if necessary. 2. A faulty brake light switch can also cause the brake light not to work. By connecting the brake light switch with a wire, if the bulb lights up, it means the switch is damaged and should be replaced. 3. A blown fuse can also result in the brake light not working. However, some cars do not have a separate brake light fuse but share it with other electrical devices. You can check the non-working electrical devices in the vehicle and replace their fuses accordingly.
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What is the reason for incorrect fuel consumption display after replacing the battery in Nissan Sylphy?

Nissan Sylphy's incorrect fuel consumption display after replacing the battery is mainly caused by the linkage between the fuel level sensor and the float being stuck, preventing the float from moving up and down normally. This results in no change in the sensor, so the fuel gauge needle remains fixed at a certain position. Fuel gauge issue: This should be a fuel gauge problem, unrelated to the battery. It is recommended to go to a 4S shop for inspection. The fuel gauge indication almost entirely depends on the fuel level sensor, so the fuel gauge needle is essentially just an intuitive representation of the fuel level sensor. Solution: If this problem occurs, it indicates an issue with the vehicle's fuel level sensor. Generally, this is due to dirt on the fuel level sensor, which needs to be cleaned promptly.
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What to Do If Your Vehicle Fails the Exhaust Emission Test?

Solutions for a vehicle failing the exhaust emission test include: 1. Take the car to a professional repair shop for engine internal cleaning; 2. Use fuel additives and catalytic converter cleaners when refueling; 3. Replace spark plugs in a timely manner; 4. Clean the front oxygen sensor; 5. Switch to higher-quality gasoline; 6. Check the engine's working condition; 7. Increase throttle and drive several dozen kilometers on the highway. Reasons for failing the exhaust emission test are: 1. Poor fuel quality; 2. Faulty catalytic converter or oxygen sensor; 3. Large spark plug electrode gap; 4. Overly rich or lean air-fuel mixture; 5. Poor gasoline atomization; 6. Abnormal engine operation; 7. Dirty vehicle intake system, exhaust system, or fuel system; 8. Vehicle aging.
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What are the causes of automotive wiring harness ablation?

Automotive wiring harness ablation is caused by improper selection of spark plug heat value, incomplete combustion, or poor gasoline quality. The troubleshooting method for automotive wiring harness ablation is to identify the specific location of the fault through the breaking of the fuse. The fuse is used to protect the car's circuit. When there is a circuit fault, the fuse burns first. When designing the wiring harness, manufacturers did not adhere to the manufacturing standards, resulting in substandard wiring harnesses, or the wiring harness was twisted too tightly during assembly, leading to breakage. The causes of automotive wiring harness breakage are divided into internal and external reasons. Internal reasons include the main harness distributing branches that are too short, causing the harness to break during vehicle operation. External reasons include modifications to the wiring harness leading to breakage, or the harness being scraped, resulting in breakage. The repair method involves cutting off the insulation layer of the burnt harness, trimming both ends of the wire, and reconnecting it with a wire of the same specification and length.
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What are the symptoms before the fuel pump fails?

The symptoms before the fuel pump fails include: 1. Weak acceleration with a jerking sensation when accelerating suddenly; 2. Difficulty starting the car, requiring prolonged key turning; 3. A buzzing abnormal noise during driving; 4. The engine warning light turns on; 5. The engine exhibits shaking. The main causes of fuel pump damage are poor fuel quality, delayed refueling, and long-term neglect of gasoline filter replacement. The function of the fuel pump is to draw gasoline from the fuel tank and deliver it through pipelines and the gasoline filter to the carburetor's float chamber, allowing the fuel tank to be positioned away from the engine at the rear of the car and below the engine. Based on the driving method, fuel pumps can be categorized into: mechanically driven diaphragm type and electrically driven type.
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How to Adjust the Headlight Height of the Prado?

The method to adjust the headlight height of the Prado is: 1. There is a set of light combination switches on the left side of the Toyota Prado steering wheel. Press the relevant button to adjust the headlights; 2. There is a screw rod above the headlights to control the light level. Insert a screwdriver to adjust it according to your requirements. The Prado's front suspension is a double-wishbone independent suspension, and the rear suspension is a four-link non-independent suspension. It is equipped with a 3.5L naturally aspirated engine, with a maximum horsepower of 280ps, a maximum power of 206kw, a maximum torque of 365nm, and is matched with a 6-speed manual-automatic transmission.
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What Are the Reasons for a Car's Reverse Gear Not Engaging?

There are several reasons why a car's reverse gear may not engage: 1. The clutch is not fully depressed; 2. There is a malfunction in the transmission; 3. The gear teeth are misaligned; 4. The car's temperature is low, and the transmission fluid has not fully lubricated; 5. The vehicle speed and gear position do not match; 6. The gear is not engaged and remains in neutral. Precautions to take when reversing a car include: 1. Adjust the interior rearview mirror to clearly see the area behind the car; 2. Pay attention to both left and right side mirrors; 3. Maintain a controlled speed; 4. Stop and yield to pedestrians and oncoming traffic when necessary; 5. Use the reverse camera to accurately judge distances.
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