Pinouts
J-01 (Main harness)
- A. Left Front Speaker +
- B. Battery 12V +
- C. Left Front Speaker -
- D. Right Front Speaker +
- E. Pulsed Dimmer TNS+
- F. Right Front Speaker -
- G. Inverted Dimming
- H. PWR Ant
- I. Speed Pulse
- J. Amp Remote
- K. Nav: Parking brake
- L. Telephone Mute
- M. Nav: Reverse
- N. Clockspring/ Wheel Controls
- O. Not connected
- R. Ignition (+12v for on)
- S. Left Rear Speaker +
- T. Not connected
- U. Left Rear Speaker -
- V. Right Rear Speaker +
- W. Ground
- X. Right Rear Speaker -
J-02 (Auxiliary Harness)
- A. Ground
- B. System Mute
- C. Right channel Input +
- D. Right channel Input -
- E. Left channel Input +
- F. Left channel Input -
- G. Signal ground
- H. Not connected
- I. Not connected
- J. Not connected
- K. Bus -
- L. Bus +
- M. Not connected
- N. Not connected
- O. Accessories power (12V+)
- P. 12V+
Sources
http://mazda-speed.com/faq/audio/#J-01