| Issue | Verified Solution | | :--- | :--- | | | Ensure your car stereo is set to the correct AUX input . Double-check that the 3.5mm jack is fully inserted. Restart the device by turning the car off and on again. | | Music sounds scratchy or low quality | The BT5908 uses the standard SBC codec, which can sometimes cause lower quality. Check your phone's volume, as it can independently affect the AUX level. Also, ensure no other Bluetooth device is connected to your phone. | | Microphone not working during calls | Verify the microphone cable is securely connected to the main module. Ensure the microphone is clipped near the driver (e.g., on the sun visor) for optimal pickup and is not blocked. | | Device not powering on | Check your wiring connections, particularly the 12V source and ground. Use a multimeter to confirm power at the connection point. The module has no internal battery. | | Phone won't disconnect | The device is designed to stay on with the car's ignition. It will disconnect automatically when you turn off the car (if wired correctly to a switched 12V source). | | Audio lag (latency) | Some users report a slight delay in audio when watching videos. This is common with Bluetooth 5.0 when not using low-latency codecs like aptX. Using the device primarily for music avoids this issue. |
This guide provides a comprehensive overview based on verified technical manuals to ensure successful installation and operation. Technical Specifications
Remove the mounting screws holding the factory head unit in place. jie rui bt5908 manual pdf verified
Select (or a similar variation like BT5908) from the list. If prompted for a pin, try 0000 or 1234 .
Connect to a solid metal ground chassis or the negative (-) battery terminal. | Issue | Verified Solution | | :---
For example, a Dutch forum member bought a wiring harness with the Jie Rui BT5908 but had sound issues. They found that selecting the AUX input on the main unit was the key.
Follow these steps to safely integrate the Bluetooth module into your factory audio system. 1. Safety Preparation Turn off the vehicle ignition completely. Remove the key from the ignition cylinder. | | Music sounds scratchy or low quality
Disconnect the negative battery terminal to prevent electrical shorts. 2. Dashboard and Radio Removal
Move the black ground wire to a cleaner, unpainted chassis metal point.