What's the matter when there is no sound in the car?
3 Answers
Car without sound should be a line connection problem. If the car suddenly has no sound, first check whether the power supply of the CD player is normal. As long as there is electricity, the indicator light should be on, and the CD player can also be turned on and off normally. If there is no electricity, please check the power supply, that is, the fuse box and the line. The following is an introduction to the technical indicators of the audio: 1. Output power: The power marked by most of the current hosts is the music power, between 40W and 60W, and the power should not be too large. 2. Frequency response: The frequency range that the human ear can hear is between 20Hz and 20KHz, so this indicator should at least reach this value, and the wider the better. 3. Signal-to-noise ratio: This indicator refers to the ratio of the music signal to the noise. Generally, high-end car audio is above 90DB, and the larger the value, the better. 4. Harmonic distortion (THD): This indicator reflects the degree of sound reproduction. The smaller the value, the higher the degree of reproduction, and the better the sound effect.
I've been driving for decades and have seen this situation quite often, usually when there's no sound upon starting. The main culprit behind a silent car is often a dead battery, such as forgetting to turn off the lights or an aging battery, leading to insufficient power—so when you press the start button or turn the key, there's no response. A faulty starter motor is another reason; you might hear a clicking sound but the engine won't crank, or there's complete silence. Gear position issues are also common; if the car isn't in P (Park), the safety system will lock the engine to prevent starting. A malfunctioning key chip sensor can also cause the ignition system to act up. Blown fuses play a crucial role in circuit protection, so check the fuse box. I recommend keeping an eye on battery health, charging or replacing it regularly to avoid trouble when heading out. If you encounter this issue, don't force the engine to start—take it to a professional shop for repair. It won't cost much and will save you hassle.
When your car is silent, don't panic—troubleshoot step by step. First, check if the key is firmly inserted and turned to the correct position. Then, observe whether the dashboard lights are on—if they're dim or off, it's likely a dead battery due to prolonged parking discharge or aging. If the lights are on but there's no sound when starting, verify if the gear is in 'P' position, as accidentally leaving it in 'D' can cause this. Next, listen for the starting sound: no noise might indicate a stuck starter motor—try gently tapping it or check for a blown fuse. I also recommend keeping a portable jump starter handy or asking a friend for a jump-start in emergencies. During routine maintenance, clean the battery terminals to prevent corrosion-induced poor contact. Last time I overlooked this, replacing a fuse myself fixed it for about ten yuan.
