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I got a 1993 precidia 3.0L 5spd, american car ,the guy that owned the car before cut the stereo harness and took the cd player with him, now i have 12 wires that i need to figure out what they do, i was wondering if any body knew these 12 wire colours what they are , im afraid of fryin something with tieing the wrong wires together, thanks

get a test light and test with test light grounded all wires with ignition on and ignition off. That will eliminate 12v constant and switched 12 volt. Once the hot wire (constant 12 volt) is found attach the grounding clip to that wire and test all other wires. You will find 2 grounds. 1 will be common ground the other will be a dimmer/illimination ground. Turn the lights on and off and the ground will dissapear. that eliminates 4 of the 12 leaving 8 that are speaker wires. Get a 9 volt battery and touch in combinations of 2 wires 1 to each prong on the 9 volt. when a speaker buzzes you have found the right 2 wires. Mark the wires as u go it will make it easier.

chew* wrote:get a test light and test etc etc etc

Or just go

Front Page => Audio System => Wiring Diagram

The speaker wires come in pairs (color and color/white), so they should be easy to distinguish. Black is ground. Whatever has 12v is constant. The wire thats left over is ACC.

fudgee1988 wrote:I got a 1993 precidia 3.0L 5spd

here's the wiring (below). But how'd you get your car to be a 3.0L??

http://www.the12volt.com/installbay/det ... ype=Stereo

1992-93 Mazda MX3 Stereo Information
Constant 12V+ Blue/Red
Switched 12V+ Blue/White
Ground n/a
Illumination Red/Black
Dimmer n/a
Antenna Driver's Pillar
Front Speakers 5 1/4" Doors
Left Front (+) Blue
Left Front (-) Blue/White
Right Front (+) Blue/Red
Right Front (-) Blue/Yellow
Rear Speakers 5 1/4" Shock Tower
Left Rear (+) Blue/White
Left Rear (-) Blue/Green
Right Rear (+) Blue/Red
Right Rear (-) Blue/Green


Good luck. and make sure you use electrical tape and not duct tape, scotch tape or any gum substance

fudgee1988 wrote:I got a 1993 precidia 3.0L 5spd, american car

1- Mx-3's are all made in Japan

2- You have 2 options, the 1.6L SOHC 4cyl, or the 1.8L V6. Possible custom upgrades are the 1.8L DOHC "BP" or the 2.5L "KL" v6.

Never heard or seen a 3.0l in an Mx-3

3.0 L lol, that would be interesting in an mx3... anyways back to the main subject, the wiring diagram on this website did not help me when i was installing my deck, and the colours mentioned in it had nothing to do with the actual colours in my car, so if that's the case with u, what i suggest to do is take it easy and don't rush at all, this might sound dumb but beware of any red wires, and make sure to connect them where they belong. i have fried my amp, and my deck because of some loose wires, so take your time and don't rush it.

Typhoonk wrote:here's the wiring (below). But how'd you get your car to be a 3.0L??

http://www.the12volt.com/installbay/det ... ype=Stereo

1992-93 Mazda MX3 Stereo Information
Constant 12V+ Blue/Red
Switched 12V+ Blue/White
Ground n/a
Illumination Red/Black
Dimmer n/a
Antenna Driver's Pillar
Front Speakers 5 1/4" Doors
Left Front (+) Blue
Left Front (-) Blue/White
Right Front (+) Blue/Red
Right Front (-) Blue/Yellow
Rear Speakers 5 1/4" Shock Tower
Left Rear (+) Blue/White
Left Rear (-) Blue/Green
Right Rear (+) Blue/Red
Right Rear (-) Blue/Green


Good luck. and make sure you use electrical tape and not duct tape, scotch tape or any gum substance

who in the world made that...2 of the speakers have the same color wires as the constant 12v and same with the swiched 12v...I wonder how many people hav used that to wire up a deck and fried it

I did I did lol , and yea i managed to fry my amp too :D:D:D

which is why i advised my step by step approach I used to be an installer and one thing i do not do is take a book or computers word that its ok to hook this wire up to that. Assuming the book/computer is always right = a possible airbag deployment , especially when doing alarms and remote starts.