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What Are the Reasons for Connected Car Bluetooth But No Sound?

2 Answers
Andy
09/01/25 4:49am
Connected car Bluetooth but no sound could be due to the phone being on silent mode or the volume being set to zero. It might also be because the car's navigation system has no sound or the volume is too low to hear. Additionally, some car Bluetooth systems may continue playing the last media audio source if the car is not on the Bluetooth media audio playback interface, resulting in no sound when playing music. Here are the specific reasons: 1. Volume: The volume on the car navigation system or phone is not turned on. 2. Signal interference: The media audio on the phone is not turned off, causing signal interference with the Bluetooth function.
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MacArianna
09/13/25 7:33am
I often encounter situations where the car's Bluetooth is connected but there's no sound. This could involve several aspects. First, incorrect device settings, such as the phone volume being set too low or the vehicle's media volume not turned up, resulting in low sound output. Another common issue is incorrect audio routing—sometimes Bluetooth only connects for phone calls, leaving music or navigation without sound, so it's necessary to check on the phone if the output device is correctly selected. Hardware failures should not be overlooked either, such as a broken Bluetooth module or poor speaker contact, especially in older car models. Software issues like system bugs or outdated firmware can also cause transmission interruptions. It's recommended to first check the basic settings; if that doesn't work, restart both the phone and the vehicle. Regularly updating the car's system can reduce malfunctions, and if this issue occurs while driving safely, it shouldn't be ignored.
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How to Test for a Faulty Car Alternator That's Not Generating Electricity?

Steps to test for a car alternator not generating electricity: 1. Set the multimeter knob to DC voltage 30V; 2. Connect the red probe to the alternator's "armature" terminal and the black probe to the casing; 3. Run the engine at medium speed or higher. The standard voltage for a 12V electrical system should be around 14V, while for a 24V system, it should be around 28V; 4. If the measured voltage matches the battery voltage, it indicates the alternator is not generating electricity. Reasons why a car alternator may not generate electricity: 1. Diode breakdown, failing to rectify; 2. Brushes stuck in the brush holder, preventing the alternator from being excited and thus not generating electricity; 3. No power to the rotor's field coil; 4. Phase-to-phase short circuit or grounding in the stator coil; 5. Loose rotor claw poles.
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What is the reason for the electronic steering lock failure in the Baojun 560 one-key start system?

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What is the appropriate tire pressure for a Mercedes-Benz C-Class?

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What Gear Should You Engage When Parking a Manual Transmission Car on a Downhill Slope?

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