Go here bud, I neede to know this too so I googled it.
http://www.modifiedlife.com/1996-Mazda-protege-car-stereo-wiring-diagram/
I found the pinout at http://www.installdr.com to be extremely helpful.
The wire coloring (wiring diagram) for my 1997 Mazda Protege LX was as follows:
Car Radio Battery Constant 12v+ Wire: Blue/Red
Car Radio Accessory Switched 12v+ Wire: Pink/Black
Car Radio Ground Wire: Black/Yellow
Left Front Speaker Positive Wire (+): Blue/Orange
Left Front Speaker Negative Wire (-): Violet/White
Right Front Speaker Positive Wire (+): White/Red
Right Front Speaker Negative Wire (-): Yellow/Red
Left Rear Speaker Positive Wire (+): Orange
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Green/Black
Right Rear Speaker Negative Wire (-): Green/Orange
http://www.installdr.com/Harnesses/Mazda-Wiring.pdf
Able stereo wiring diagram, for your Mazda, can be obtained from most Mazda dealerships. The wiring diagram will make wiring your stereo much easier.
i need stereo wiring schematic for 08 mazda 6 non-bose
The 1999 monster truck stereo wiring diagram can be obtained from most Mazda dealerships. The stereo has a wiring harness consisting of five wires.
A Haynes repair manual for the 91 Mazda 626 features a wiring diagram for the stereo hookup. The manual can be purchased at the book store or checked out from the library.
the12volt.com
Email me for a wiring diag. dwillman@canada.com
Check modifiedlife.com, they have free wiring diagrams.
Try this - it's the best thing i found... so far... http://www.installdr.com/Harnesses/Mazda-Wiring.pdf
Wiring diagram for 96 Mazda b2300
Need visual diagram wiring for 2001 Mazda tribute
try 12volt.com, they have free wiring diagrams for most cars, you have to register with the site but it is free and they dont sell your info.