Quote Originally Posted by Cab0oze View Post
That doesn't work for everyone, that is only if you had a cd changer I think. For people that only supported 1 cd (like me) you had to use the Tape/MD button. Pressing the CD button a second time does nothing. (after doing some research I found that some people with a cd changer could press CD a second time and have it display "EX").
Auxmod allows you to use the tape/md button, but there is additional circuitry required, it is not just a simple wire that can make it work. Same with GROM afaik.
auxmod interfaces with the unused tape/MD addon interface port at the bottom of the head unit, that's why people must use the tape/MD button for the auxmod, because it is behaving as if it is a tape player
the CD button DOES work even if you have a single disc player to cycle over to the external CD changer mode... the 04-05 head units are actually completely modular... base headunit the same for most 3s, it's the CD module/drive that's different depending on CD changer or single disc