Audio Systems: ford explorer, auxiliary input adapter, ford radio

Question
QUESTION: Can you tell me if I can fit a 3.5 aux output to the standard head unit and if so how do I and what leads I need to do it many thanks

ANSWER: yes that is  possible , the radio needs to have sat controls  or aux controls the dvd port
or the external cd changer,

i need the vehicle year

---------- FOLLOW-UP ----------

QUESTION: The vehicle year is 1997 there is no cd auto changer but there is a button on the head unit to press for it
Many thanks

Answer
If your ford radio have a CD button and no cd changer use this interface  http://www.oemautosound.com/pc-172-86-pie-frdf-aux-ford-auxiliary-input-adapter-

if there is a 6 disc cd changer  use this interface, it only works with the factory cdc changer
http://www.oemautosound.com/pc-392-86-pie-x3-frdw-ford-95-05-triple-input-auxili

good luck