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 Mx3 stock stereo wiring to new head unit 
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Joined: October 13 2009, 8:21 PM
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Post Mx3 stock stereo wiring to new head unit
Hello all,
I have a 1995 mx3 and it still has the stock cassette player in it. Im still working on getting that thing out of there but i was wondering what is the easiest way to get the correct wires for my aftermarket head unit. I searched around and counldnt really find anything of the same nature but i will keep searching this site. I was looking on ebay and i saw some wiring harnesses for around $6. Im not sure what i need to get my head unit to work. All help is appreciated. Thanks in advance.


October 13 2009, 8:26 PM
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Joined: October 01 2008, 10:32 PM
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Location: Toronto, Ontario
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Post Re: Mx3 stock stereo wiring to new head unit
Just get an adaptor from walmart or best buy, it's straightforward

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October 13 2009, 10:03 PM
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Joined: April 07 2008, 1:06 PM
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Post Re: Mx3 stock stereo wiring to new head unit
The harness chart for the car is on here somewhere, search for it.

then its simple mix and match!

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October 13 2009, 11:31 PM
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Joined: January 15 2009, 9:00 PM
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Post Re: Mx3 stock stereo wiring to new head unit
The harness I have even has the component written on each wire (ie: rear left, right front, battery, etc.) and they are color coded.

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October 13 2009, 11:35 PM
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Joined: March 02 2010, 11:17 PM
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Post Re: Mx3 stock stereo wiring to new head unit
Here is the Mx3 side..
Hope that helps
1993 Mazda MX3 Car Stereo Wiring Guide

Car Radio Battery Constant 12v+ Wire: Blue/Red
Car Radio Accessory Switched 12v+ Wire: Blue/White
Car Radio Ground Wire: Chassis
Car Radio Illumination Wire: Red/Black
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 5 1/4″
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Blue
Left Front Speaker Negative Wire (-): Blue/White
Right Front Speaker Positive Wire (+): Blue/Red
Right Front Speaker Negative Wire (-): Blue/Yellow
Car Audio Rear Speakers Size: 5 1/4″
Car Audio Rear Speakers Location: Shock Tower
Left Rear Speaker Positive Wire (+): Blue/White
Left Rear Speaker Negative Wire (-): Blue/Green
Right Rear Speaker Positive Wire (+): Blue/Red
Right Rear Speaker Negative Wire (-): Blue/Green


March 23 2010, 2:30 AM
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Joined: April 07 2008, 1:06 PM
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Post Re: Mx3 stock stereo wiring to new head unit
That chart is WRONG!

blue/white can't be three things at once.

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Black '93 BP RS - wrecked, parted, scrapped.
Green GS - Sold.
Black GS - Summer DD/Race car - Fancy KLZE
Red GS - K8-ATX -> MTX-KLDE - Frakencar. Scrapped
White GS - Rusty. Parts. Scrapped
1997 BMW M3 - my summer baby
2002 BMW 325Xi - sold
2003 Forester Xti - EJ20K swapped.
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May 14 2010, 8:25 PM
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Joined: July 09 2010, 9:57 PM
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Post Re: Mx3 stock stereo wiring to new head unit
Hi, I am a new member of forum. Would a newcomer be warmly welcome here? Good day you guys!!!




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July 09 2010, 9:59 PM
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