Finally, after many months, I found a DIY guide for creating an AUX input for my Masda 3 (2006) and here it is:
Note: this was done on a 2006 M3, with the standard (non-Bose) head unit. I have not tried this on any other model.– The original article was taken from: http://www.mazdas247.com/forum/showthread.php?123634459-Options-for-adding-an-auxiliary-input-on-the-Mazda3/page16
You'll need some wire, some shielded audio cable with a 3.5mm male jack to connect to your mp3 player headphone jack, and a connector to fit the CD-Changer port on the back of the head unit, and that's all! For the connector, a standard 0.1" spacing 2x8 female header will fit, like this: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=A26458-ND or any equivalent part. Obviously the shape of this connector doesn't match the Mazda head unit, but the electrical connections match and it fits snugly enough so it won't vibrate off. If you have a dead CD Changer then you can salvage the proper connector from that.
Refer to the diagram posted in this thread by "TheMan" way back in 10-01-2006, on the first page.
1) Solder a short piece of wire from pin 2M to 2A. This makes the head unit think there's a CD changer connected, and enables the "MEDIA" button.
2) Solder your headphone cable right channel, to pin 2C.
3) Solder your headphone cable left channel, to pin 2E.
4) Solder your headphone cable shield, to pins 2D and 2F together.
The "MEDIA" button on the head unit will activate the aux port, and the car's LCD display will show "AUX".
Note that pin 2O (2-oh) on the connector provides a switched 12V signal, but this cannot power an mp3 player directly. This pin is intended to control an electronic power switch in the CD-Changer. If you need switched power for your player, you can tap off the head unit main harness.
This is the original diagram posted by "TheMan":
First Rule in car electricity :
ReplyDeletefirst unplug the power supply before modification