line in in factory CD player

Does anybody know if the factory CD player / Tape Deck / Radio in a 2003 Tacoma has the ability to accept a "line in" audio signal? There's not one on the front, but I thought somebody might know if there was a CD changer option available, which would mean there is probably an audio input for the changer. So I'm hoping what I can do is find an appropriate adapter and plug my, e.g., MP3 player into the CD changer line-in terminals and listen to MP3s without the quality degradation of an FM modulator or a tape-adapter.

I could of course tear the radio out and look for extra terminals and then experiment with them, but I thought it might be easier to ask first. :)

Thanks,
-Jon

If memory serves me correct, most CD changers don't use your standard RCA style Audio jacks like let's say an amplifier would. Most of them have a connection similar to a S-Video style input. My old setup was done that way. But it wasn't stock. It had the audi oin style jacks for the amp, then a seperate S0video style jack to plug in the changer. Right now I have a JVC head unit with a ywelve disc changer, but I have no idea how it's connected. I know the audio in/jack is being used by my amp so I'm going to guess the changer has it's own style jack. I'm wiling to bet a stock tape deck is the same.

Try best buy or circuit city they sell all kinds of wirring harnes adapters for people who want cd changers for there stock stereo's.