I recently bought a used Honda Civic 2004 LX and I noticed that only the driver side speaker is working. I tried upgrading my passenger side speaker with aftermarket ones, but they aren't working. I've checked the speaker cables and they seem fine. Researching online, I found that there's no specific fuse for the speakers, and suspect it could be related to the radio unit since I'm still using the original factory radio.

Additionally, I've noticed that my rear speakers aren't working either. How can I troubleshoot this issue further? Any suggestions or similar experiences with Honda Civics would be greatly appreciated!

 

Remove head unit and see if the wires are hacked. Wouldn’t surprise me if previous owner had an aftermarket head unit and put back the stock one

 

I just replaced my stock radio with an aftermarket screen and the same issue persists. Only my left speaker is working. So i took out the right speaker and tried putting in an aftermarket speaker but it also did not work. Is there a fuse for a speaker I can check ? Cables look fine but im not sure where the issue is coming from. Any ideas ?

 

sounds like the door jamb wires are broken at the plug. Had this issue on my old '94 Civic sedan. I was wiring up keyless entry (car alarm) and the doors locked occasionally. Removed the plug and found a broken wire. If that is your issue as well, you can go to the salvage yard and look for a 96-00 Civic, plugs behind the headunit. It is the same pin style as the door jamb. You can remove the broken pins and install the new one (with wire pigtails of course)