Ford auxiliary input adapter, Most Ford radios have CD changers and Satellite control ( Sat ) or Aux buttons they are use for the external CD changers, Satellite or rear factory DVD,  you can use that plug on the Ford radio to install the auxiliary audio input jack for mp3 iPod iPhone audio input interface, input Auxiliary input converters are designed to convert this ports of the Ford Lincoln radios into auxiliary audio input. Devices such as iPods iPhone, DVD, Zune Mp3, Video and Satellite Radio can be added to the Ford radio without Fm modulation or FM transmitter this technology maintains full function of all Ford features built-in steering wheel and rear seat controls. .check your factory Ford radio for this button Sat Aux CD before you pick the aux interface., 1995 and up radios need to have a Cd button, If changer is present use the X3-FRDW triple auxiliary audio input to keep the CD changer and auxiliary audio input interface if CD player radio press Cd twice to activate aux input, If radio comes with in dash Cd-6 press CD button twice radio must display no dj no CD in this case use FRDN-AUX, If radios comes with a Sat button use FRD03-AUX/S 2004 and up ford radios with Aux button use the FRD04-AUX Ford radios with mp3 logo are satellite ready  interface comes with Ford plugs harness plug and play Escape Explorer Expedition Focus F150 Mustang Taurus  If you need help finding the correct auxiliary aux interface for your Ford vehicle E-mail us or 888-231-0395   Ford iPod interface