Just wondering if anyone has some information on what colors of the factory stereo wiring correspond with newer stereo harnesses. I searched the factory service manual pdf's and they dont seem to talk about color's, just a picture of different plugs that hook up to the old mazda stero. Mainly i just need to know what illumination and the 12v wires are.

 

www.Installdr.com

This will answer all of your questions on wire colors and functions. And in the chance you missed it, look at the WIRING DIAGRAM section of the FSM. Illumination+ would be tied to the headlight combination switch

 

you can buy an adapter for almost any car at your local walmart for $10 or less

 

Thanks for the info akagi, installdr had a nice diagram with the correct locations, now i have a stereo

 

+987987 to getting those adapter plugs that make wiring clean and easy.

Probably too late, but this is from the FAQ at the top of the 2nd gen. section.

https://www.rx7club.com/showthread.p...72#post5131072

post #3:

What are the wire colors for adding aftermarket radio
LTBlue/Red= 12v+
LtBlue/White= +Accessory
LtBlue/Yellow= -power ant trigger
Red/Black=+ Lumination
White=Factory Amp Turn on

Ground to the body, use the 10mm bolt behind the center console front drivers access panel. Do not use the Red/Black as ground it will damage the interior light circuit and dimmer in the car

Front Speakers (maximum of a 15 watt peak from the radio):
LtGreen/Red= Left
LtGreen/Black= Left

LtGreen= Right
LtGreen/Yellow=Right

Rear Speakers (if applicable, if you have the amplified rear speakers again the Maximum of 15 watts peak is all the stock speaker amp input can handle):
Brown= Left rear
Brown/White= Left Rear

LtBlue= Right Rear
LtBlue/Orange=Right Rear

Note: as mentioned above the power antenna's trigger is ground (or - ). With all aftermarket radio's antenna output as 12 volts positive (+). To make a stock power antenna work you need a relay wired like this:


Some S4 models will have amplified doors woofers. There will be a round 6 pin low level DIN plug found on these models at the back of the radio.

Stock Speakers / Amps
Speaker Size:
Dash: 130mm (4”)
Door: 160mm or 150mm (6”) (note: true 6.5” speakers are 170mm)
Rear tower: 4” or 6"
Headrest: 3.5”
Rear floorboard: 5.25”

Amp Locations:
Door speaker amps are behind the driver’s dash speaker.
Front dash amps are next to the radio, or on the passenger’s side next to the pass speaker.
Rear amps are next to the radio (6" speakers), or on each speaker (4" rear speakers).
Headrest speaker amp is in the driver’s side just below the B pillar