I’ve seen this a few times, and it’s a hack worth to share.
Many times, we found ourselves owning a car with a CD player, but no AUX-IN. Who uses CD’s these days, anyway? Noah decided to un-crapify his car audio on a 2001 Ford Focus.
The hack itself is pretty simple. Open up the unit, and you’ll find two separate modules: CD player, and radio/amplifier unit. Both are connected through a flex cable.
Noah was fortunate, since he had taps for each pin, so he didn’t had to solder directly on the plug’s pins. So, he identified ROUT, LOUT and a ground connection, soldered the pins, and he’s ready to go.
Since he tapped on the CD player’s pins, a CD must be inserted in order to trigger the input.
Easy as recording an audio CD without any tunes in int: plain old silence.