Short in Auxiliary. One speaker has little sound
When I plug my phone into my car auxiliary,only one speaker has proper sound
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a). Has it worked OK before when you connected the phone to the car's aux input?
b). Have you proved that the phone is supplying stereo sound OK by using headphones and listening to both left and right speakers individually?
c). If you can, try connecting the phone and stereo audio cable to another powered speaker system, (e.g. aux input of a Bluetooth speaker) and listen if you have stereo sound to prove whether the problem is with the stereo audio cable or the car's aux input.
d). Are you using a stereo audio cable such as shown in the image, (each plug at the end of the cable has 3 connectors) to connect from your phone's headphone socket to the car's aux input?
(click on image to enlarge for better viewing)
If the problem is with the cable and the left speaker has no audio then there is a problem with the wire connecting the tip connector of one plug to the tip connector of the plug at the other end. If there is no audio in the right speaker then there is a problem with the wire connecting the ring connector of one plug to the ring connector of the plug at the other end. (the connectors are known as tip, ring and sleeve when viewed from the end i.e. the tip).
It is usually cheaper to replace the cable than to try and fix it. Just search for Shielded 3.5mm Stereo Audio Cable Male to Male to find a supplier that suits you best
If it works OK when connected to another powered speaker system (as in c). above) then there is a problem with the car's aux input.
Hopefully this is of some help
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