I just installed a new head unit in my s and i want to maintain the functionality of the mute button...(it was the only button i ever used in the first place) My pioneer premier DEHP740 has a mute lead in, but i am not sure how to connect the button to the head unit. I remember reading about some modifications that have to be done to make it work, but i cannot find that thread anymore. Any help is greatly appreciated. Thanks

 

See my webpage for a schematic...

 

macgyver,

thanks for the schematic...i am going to stop at RatShack today and get that relay. I knew there was something to do, but i couldn't remember what it was...thanks for you help.