Pinouts >  Mazda, Mitsubishi Car audio harness  >  Mazda pinouts
including steering wheel controls

Pin General Application Application/Color
2003 Miata 2003 Miata Bose 2004 Miata 2004 Miata Bose 2003 MPV 2003 Protege 2004 RX-8 Mazda6 Non-Bose Mazda6 Bose
A Left Front + Left Front + Left Front + Left Front + Left Front + Left Front + Left Front + Left Front + Left Front + Left Front +
Yellow/ Red Red   Black Blue/ Orange Black/ Red Red/ Blue Red ?
B Battery (+12V) Battery (+12V) Battery (+12V) Battery (+12V) Battery (+12V) Battery (+12V) Battery (+12V) Battery (+12V) Battery (+12V) Battery (+12V)
Blue/ Red Blue/ Red   Blue/ Red Blue/ Red Blue/ Red Blue/ Red Blue/ Red Blue/ Red
C Left Front - Left Front - Left Front - Left Front - Left Front - Left Front - Left Front - Left Front - Left Front - Left Front -
Yellow/ Black White   Green Violet Black/ White Light Green/ Red White ?
D Right Front + Right Front + Right Front + Right Front + Right Front + Right Front + Right Front + Right Front + Right Front + Right Front +
Yellow/ Green Yellow   Red White/ Red Red Blue/ White Blue ?
E Pulsed Dimmer (TNS+) Pulsed Dimmer (TNS+) Pulsed Dimmer (TNS+) Pulsed Dimmer (TNS+) Pulsed Dimmer (TNS+) Pulsed Dimmer (TNS+) Pulsed Dimmer (TNS+) Pulsed Dimmer (TNS+) Pulsed Dimmer (TNS+) Pulsed Dimmer (TNS+)
Red/ Black Red/ Black   Red/ Black Light Green/ Blue Light Green/ Blue Red/ Yellow ? ?
F Right Front - Right Front - Right Front - Right Front - Right Front - Right Front - Right Front - Right Front - Right Front - Right Front -
Green Orange   White White White Yellow/ Green Yellow ?
G Inverted Dimming Inverted Dimming Inverted Dimming Inverted Dimming Inverted Dimming Inverted Dimming Inverted Dimming Inverted Dimming Inverted Dimming Inverted Dimming
Grey/ Red Grey/ Red   Grey/ Red White/ Blue White/ Blue Grey/ Red Black/ Red? ?
H PWR Ant PWR Ant PWR Ant PWR Ant PWR Ant N/C N/C PWR Ant N/C N/C
Grey/ Black Grey/ Black   Grey/ Black     Yellow/ White    
I Speed Pulse N/C Speed Pulse N/C Speed Pulse N/C N/C Speed Pulse Speed Pulse Speed Pulse
  Green/ Red   Green/ Red     Green/ Red Green/ Red ?
J Amp Remote N/C Amp Remote N/C Amp Remote Amp Remote Amp Remote Amp Remote N/C Amp Remote
  Light Green/ Black   Light Green/ Black White Yellow (woofer?) Purple/ Blue   ?
K Nav: Parking Brake N/C N/C N/C N/C N/C N/C Nav: Parking Brake N/C N/C
            Yellow/ Green    
L Telephone Mute N/C N/C N/C N/C N/C N/C N/C N/C N/C
                 
M Nav: Reverse N/C N/C N/C N/C N/C N/C Nav: Reverse N/C N/C
            Blue/ White    
N Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls
        Grey/ Black   Red/ Black Red/ Blue? ?
O blank blank blank blank blank blank blank blank blank blank
                 
P Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls Clockspring/ Wheel Controls
        White/ Green   Green/ White Blue/ White ?
Q blank blank blank blank blank blank blank blank blank blank
                 
R IGN (+12V switched) IGN (+12V switched) IGN (+12V switched) IGN (+12V switched) IGN (+12V switched) IGN (+12V switched) IGN (+12V switched) IGN (+12V switched) IGN (+12V switched) IGN (+12V switched)
Blue/ Black Blue/ Black   Blue/ Black Purple/ Blue Purple/ Black Green/ Orange Orange? ?
S Left Rear + Left Rear + N/C Left Windblocker + Left Windblocker + Left Rear + Left Rear + Left Rear + Left Rear + Left Rear +
      Blue/ Yellow Green/ Orange Brown/ White Green/ Orange Purple ?
T blank blank blank blank blank blank blank blank blank blank
            Black/ White ? ?
U Left Rear - Left Rear - N/C Left Windblocker - Left Windblocker - Left Rear - Left Rear - Left Rear - Left Rear - Left Rear -
      Yellow Green Brown Blue/ Orange Pink ?
V Right Rear + Right Rear + N/C Right Windblocker + Right Windblocker + Right Rear + Right Rear + Right Rear + Right Rear + Right Rear +
      Green/ Yellow Yellow/ Black Green Grey/ Red White/ Blue ?
W Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground
Black Black   Black Black Black Black Black Black/Orange
X Right Rear - Right Rear - N/C Right Windblocker - Right Windblocker - Right Rear - Right Rear - Right Rear - Right Rear - Right Rear -
      Green/ Black Purple Green/ Orange Brown/ Red Black/ Blue ?

 

Steering Wheel Controls

The steering wheel controls are momentary switches connected to pins P and N of the harness. They short these pins with various levels of resistance which is decoded into the various functions. I took apart my MPV's head unit and read the resistance on the functions it has. I then tried this control with my Miata's 4H60 head and the controls all worked perfectly. So this might presumably work with all FMS double-DIN heads!

Application Resistance
Mode 1k Ohms
Vol+ 150 Ohms
Vol- 60 Ohms
Track 300 Ohms
Mute 2k Ohms

 

24 pin Mazda Head Unit proprietary of Mazda 2003-2005 All-in-one car stereos connector layout
24 pin Mazda Head Unit proprietary connector
at the car stereo
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