Why is only one speaker working after modifying the car CD audio?

[Edward]

The reasons why only one speaker is working after modifying the car CD audio are as follows: Connection wire issues: Swap the two pairs of wires connected to the speakers and check if the same speaker still doesn't work. If the same speaker remains silent, it indicates damage to the internal components of that speaker. If after swapping the wires, the previously silent speaker works and the previously working speaker stops, then there's an issue with the computer audio system or its preceding components. If both speakers work after swapping the wires, it means the original connection was loose. Poor plug contact issues: Check the connection wire between the computer and computer audio system to see if any wire is loose or if there's poor plug contact, then firmly reconnect. Examine the connection wire between the computer audio system and speakers for poor contact or looseness. If the problem persists, it indicates an internal fault in the computer audio system or a malfunction in the computer sound card. Sound card configuration issues: If the issue lies with the sound card settings, open the sound card settings interface in the control panel (or double-click the small speaker icon in the system tray) and check if the channel balance is set to the middle. If not, adjust the left and right channel balance to the center.