MP3 Audio input for car stereo?

Ok, this will probably seem like a rather stupid question, but I'm stuck. I have a car stereo that I had professionally installed a few years ago because the CD player would also play MP3 CDs (get about 150+ songs on a disk). I now have an MP3 player that I want to be able to play my songs through the stereo. The car stereo has an MP3 Input connector, and I recently picked up an input cord through eBay (didn't have one, only had earphones for me to listen to it directly) so that I can listen to the music this way; however, when I select the AUX function on the car stereo for this to work, I don't get any sound.





Does anyone have any advice on what my next step should be (ex: specific kind of input connector cord I should pick up to connect the MP3 player to the stereo, or something else that I may not be doing right)? Thanks much all!

MP3 Audio input for car stereo?
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It's not wireless so there's no interference. Not to be confused with an FM transmitter. Basically it adds an AUX input to ANY radio. No searching for a clean channel.





It feeds your audio signal from a headphone jack ( or RCA cables) by FM modulation, directly into the antenna input on your radio bypassing the antenna when on, allowing the radio to work as normal when off. It comes with an On/Off switch.








This is the answer. Totally versatile.





Here's one in action - http://www.youtube.com/watch?v=MHBI0LBGh...
Reply:all you need to do is check to see if your radio has pre outs on the back, if it does just plug in the adapter and then plug in your audio cable from your mp3 player to the plug that now sits in front of your radio. been there done that worked out just fine for me%26amp; still use it.
Reply:the easiest solution may be to purchase a transmitter specifically designed for mp3 players and tune your music in through the fm radio band. this is what i do, and works very well most of the time. you can get them at stores like staples, radio shack, walmart, etc.