Why don't I get sound on aux cords?

I have an iPhone 5s, and I can't get it to work with the aux cord in the car but my sister couldn't with her 5, then her 5s, then her SE. It doesn't work with aux cord speakers either. My phone works perfectly fine with headphones and my family uses amazon music.

*my sister could get it to work

Do you have the proper input adapter cable?

  • Where can I find these cords on Amazon? Both these cords direct audio and recordings to an iPhone or Android device (from a 3.5mm jack), but I can't find them on Amazon because I do not know their names. If anybody knows the specific names of these cords, you will be of great help.
  • What do you call the charger cords for Cameras, Go Pros, or other things? Recently, an insane portable charger destroyed every charger I own. I need to buy more, but i'm not sure what they're called because they all came with the cameras. I'm referring to the ones that could easily fit into the white Iphone charging block, but not Iphones.
  • What cords do I need to connect my iPhone 5c to the tv? I'm not sure if I needed to buy two separate cords like the hdmi and lighting digital What stores?
  • Speakers sound blown out when I play my music on the Aux cord? So starting today I put my Aux cord into my iPhone 6 to connect to my Pontiac Torrent to play music, and the audio was absolute garbage! It sounded like my speakers were blown out, which scared me. But I went to my radio to see if it did the same and it was fine! I thought it was just the aux cord breaking, but I bought a new one after work and it didn't help at all. What is wrong with my auxiliary port?