Aux cord not working when plugged up

[Purdy aka]

When i put my car radio on aux mode and plug it up it says no signal and doesn't play the music from my phone? Help

 

[ab190670]

Hi a bit more info may help, what phone etc

 

[B. Diddy]

Welcome to Android Central! Are you connecting the Aux cable to the phone's headphone jack? Is the Aux cable specifically "Made for iPhone," or is it universal?

 

[Rukbat]

The Aux cord for a car radio should be RTS, not RTTS - 3 connections, not 4. It's a standard audio cable.