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What are the reasons for the car tachometer not working?

1 Answers
Aurora
07/30/25 5:02am
Car tachometer not working reasons are: 1. Tachometer damage; 2. Tachometer needle stuck; 3. RPM sensor coil damage. Solutions for car tachometer not working: 1. Inspect and repair the car tachometer; 2. Clean dust and debris inside the tachometer; 3. Repair or replace the RPM sensor. The car tachometer is located in the instrument panel, symmetrically placed with the speedometer. Its working principle is: receiving pulse signals generated when the primary current in the ignition coil is interrupted, converting this signal into a displayable RPM value. The faster the engine speed, the more pulses the ignition coil generates, and the higher the RPM value displayed on the gauge.
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What are the techniques for removing asphalt black spots on white cars?

First, use a cleaning agent to thoroughly wash the entire car. Spray tar remover on the asphalt black spots on the car body (tar remover can effectively decompose asphalt). After letting it sit for 3 minutes, wait for the cleaning agent to soften and decompose completely, then wipe it clean with a towel.
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How to Use Air Conditioning When There's Fog Inside the Car on a Rainy Summer Day?

When driving in the rain and encountering foggy windows, turn on the front window defogging mode, then set the fan speed to maximum and turn on the A/C. Adjust the temperature to the lowest setting, use the internal circulation, and direct the air vents towards the foggy windows. The fog on the windows will disappear shortly.
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What is the detailed explanation of the Honda Lingpai warning lights?

Honda Lingpai warning lights are explained in detail as follows: 1. Seat Belt Reminder Light: When the ignition switch is turned to the ON (II) position, this light will illuminate to remind occupants to fasten their seat belts. If the seat belt is not fastened, a buzzer will also sound. If the ignition switch is turned to ON (II) without fastening the seat belt, the buzzer will sound and the light will start flashing. If the seat belt is not fastened before the buzzer stops, the light will stop flashing and remain illuminated. 2. Brake System Indicator Light: When the ignition switch is turned to ON (II), the brake system indicator light usually comes on to remind you to check the parking brake. If the parking brake is not fully released, this light will remain on. If the brake system indicator light comes on while driving, it may indicate that the brake fluid level is very low. Gently press the brake pedal to check if it feels normal. If it feels normal, check the brake fluid level at the next gas station stop. If the level is low, take the vehicle to an authorized dealership to check for leaks or brake pad wear. However, if the brake pedal feels abnormal, take immediate action. 3. Low Oil Pressure Indicator Light: This light should come on when the ignition switch is in the ON (II) position and go off after the engine starts. It should remain off while the engine is running. If it starts flashing or stays on, it indicates very low or no oil pressure. In this case, the engine may be severely damaged, and immediate action should be taken.
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What to Do When the Hyundai Steering Wheel Locks Up?

Hold the steering wheel with your left hand and gently shake it, while simultaneously turning the key left and right with your right hand to unlock. Under normal circumstances, simply inserting and turning the key will unlock it. If you encounter an uncertain situation, promptly call the customer service hotline for inquiries to avoid damage.
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How to deal with color bleeding from red cloth on a white car?

Gasoline can dissolve certain substances. Dip a car wash towel in some gasoline and gently wipe the vehicle. Avoid rubbing too hard to prevent damaging the car paint. You can purchase professional car cleaning clay. Soak it in water for half an hour before use, and after it softens and bubbles, gently rub the stained area to remove the color.
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How to Turn on the Air Conditioning Without Fogging Up the Windows on Rainy Days?

Spraying anti-fogging agents on the windows is a relatively simple and convenient method, and it is also quite affordable to purchase online. When turning on the air conditioning, you can slightly open the windows to create a convective airflow, which can effectively remove fog and prevent it from forming on the windows again.
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