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Metra 70-7904 Receiver Wiring Harness

Connect a new car stereo in select 2001-up Mazda vehicles

113 Reviews | 2 questions - 7 answers

Item #: 120707904

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Overview

This vehicle-specific wiring harness makes connections between your new car stereo and your car's electrical system.

Metra 70-7904 Receiver Wiring Harness

This vehicle-specific wiring harness makes connections between your new car stereo and your car's electrical system.

First, attach the color-coded wires on your Crutchfield-supplied harness to the wires from your new stereo. If you're not using a soldering iron, we recommend that you purchase some wire connectors to secure the connections. Check out our handy article on three ways to connect the wiring harness here.

Now, once this harness is connected to your new stereo, you'll be able to plug right into your car's factory radio connector. This harness makes installing your new stereo easier, and allows you to put the factory radio back when you sell your vehicle or return it at the end of the lease. A detailed instruction sheet comes with the harness. Warranty: 60 days.

Please read this important note: This harness may not contain provisions for every wire needed to complete your installation, and it will not accommodate special navigation, video, or factory steering wheel control connections. You will need a special adapter if you want your factory steering wheel audio controls to work with your new stereo.

Note: Most vehicles will require additional installation parts — please identify your vehicle if you haven’t done so. You can also call an Advisor for more information.

Does what it's supposed to do.

SteveM, Ottawa Canada

What's in the Box:

  • Receiver wiring harness
Reviews

Metra 70-7904 Receiver Wiring Harness Reviews

Average Customer Review:

113 Reviews

Great, but lacking available steering wheel control wires

Written by: SteveM from Ottawa Canada on October 29, 2014

Does what it's supposed to do.

Pros: Does what it's supposed to do. Reasonable instructions.

Cons: Lacks wires for steering wheel controls. The Mazda's steering wheel controls are in the regular wire bundle, but if you buy a steering wheel control adapter you have to manually splice on to the wires from the Mazda bundle because the Metra harness does not provide them. The connector has the slots, Metra just doesn't populate them. Disappointing.

Does what it's supposed to

Written by: 00Sebby from Knoxville, TN on October 14, 2014

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

It works... wires are labeled and easy to match. Pins are easy to remove and change if needed.

Pros: Easy to use, accurate labels and wire colors

Cons: None

2004 Mazda 3

Written by: ICW from OKC on September 17, 2014

2004 Mazda 3
Crutchfield Customer Review (What's this?)

Could not have asked for better. Instructions came with it, and were perfectly clear.

Pros: Instructions are clear. Fits perfect.

Cons: none

Wrong harness

Written by: pfrat from Rockville, MD on September 4, 2014

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

Did not fit m y 2008 Maxda MX5.

Pros:

Cons:

Metra 70-7904 Receiver Wiring Harness

Written by: Anonymous from Henderson ky. on August 19, 2014

2011 Mazda MX5
Crutchfield Customer Review (What's this?)

Easy install with the connectors

Pros: Perfect match

Cons: None

Good Harness

Written by: Steven S from Dallas, TX on August 13, 2014

2005 Mazda Miata
Crutchfield Customer Review (What's this?)

Fit perfectly on my '05 MX-5. No install issues. The Crutchfield install instructions made connecting to the Pioneer AVH-X2600BT simple.

Pros: Plug and Play

Cons: None

Good harness, could use some tefiniment

Written by: Patrick from Roanoke, Virginia on July 26, 2014

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

Fits very well and the color coded wires are great. The only reason I gave this four stars is because it's missing pins to tie in the factory steering wheel controls. I had to buy a second harness to get two pins to install the steering wheel adaptor without cutting the factory wiring harness.

Pros:

Cons:

Good harness

Written by: Anonymous from Clovis ca on July 17, 2014

Crutchfield Customer Review (What's this?)

Does what it's suppose to on MS3

Pros:

Cons: If replacing stock stereo you won't be able to hook up the oem screen

Works perfectly

Written by: Jake from New Jersey on July 5, 2014

2005 Mazda 3
Crutchfield Customer Review (What's this?)

Works great, does exactly what it's supposed to do. Great product.

Pros:

Cons:

a real time saver

Written by: james mc from tallahassee fl on June 26, 2014

2007 Mazda MX5
Crutchfield Customer Review (What's this?)

installed my first car stereo in 1973 when you were on your own to figure out wiring harnesses, etc, this saved a lot of time and worked out of the box.

Pros:

Cons:

Adapter

Written by: RedHead from Kansas on June 20, 2014

Crutchfield Customer Review (What's this?)

When I received my adapter it didn't work. I went through a TON of troubleshooting only to figure out the adapter was wired wrong.The red wire was in the wrong hole on the adapter so this was making my stereo not even turn on. I thought I had a faulty stereo. Fortunately, Crutchfield has amazing customer support and they sent me a new adapter and after 5 days I received it, hooked it up and TADAA it works.

Pros:

Cons:

Perfect.

Written by: Alex from Columbia, MO on June 8, 2014

2005 Mazda 3
Crutchfield Customer Review (What's this?)

Used this to connect my factory harness to my new Pioneer FH-X700BT. Probably took me about 20 minutes to wire in the harness and then plug it in. I drive a 2005 Mazda 3 Hatch, 6 speakers, no nav, and no Bose sound. This works perfectly. This is my first time installing aftermarket audio. Instructions made it incredibly easy and straightforward. Pretty much, just match the colors, twist, crimp, tape, and zip-tie. Clean install. Crutchfield shipped it stupid fast to my doorstep. I love it.

Pros: Plenty of beefy wire to work with. Wires are already stripped. Instructions were easy to read, with a well laid-out wiring diagram.

Cons:

Miata good match

Written by: Dan from Easton pa on June 6, 2014

2003 Mazda Miata
Crutchfield Customer Review (What's this?)

03 miata perfect fit

Pros: Fit

Cons: None

Simplified installation process

Written by: donb from Carmel, CA on May 16, 2014

2007 Mazda MX5
Crutchfield Customer Review (What's this?)

Installation instructions helped tremendously and everything, including illumination control worked fine.

Pros: Works fine

Cons: None

cd player

Written by: matthew from Amarillo tx on May 11, 2014

Crutchfield Customer Review (What's this?)

Love the cd player and the help I received installing it.

Pros:

Cons:

Good Choice For My Installation

Written by: bcl from Alabama on May 7, 2014

2003 Mazda Miata
Crutchfield Customer Review (What's this?)

This wire harness made my installation much easier than it could have been. The instructions matched the wire colors of my vehicle and head unit exactly. I soldered my connections and used shrink tubing to keep it neat and everything just snapped together when the head unit was installed. The only thing that would make this easier is if there was a solderless way to make good secure connections. Definitely better than trying to install without this. I would definitely get this again.

Pros: Very good instructions. Decent quality materials.

Cons: Soldering is a little tedious.

Perfect fit for 2004 Mazda 3

Written by: PrestonG from Rockville, MD on April 24, 2014

2004 Mazda 3
Crutchfield Customer Review (What's this?)

Very easy harness to wire. I matched and soldered all connections. It was not clear that if you connected both the red(+ ignition) and black (- ground), that you also had to connect the yellow(+ battery), but a quick call to the Crutchfield support line fixed that. Make sure you connect both the red and yellow sets of wires.

Pros: Snaps in to the stock wiring harness perfectly.

Cons: Have to connect wires manually. If you are no good at electrical, I suggest you take it to an installer. Instructions could be a little clearer.

Good but not perfect

Written by: AaronL from Sterling, MA on April 24, 2014

2007 Mazda MX5
Crutchfield Customer Review (What's this?)

This harness did fit and work mostly fine, and includes all the common wires. Unfortunately, it does not include wires for the factory Bose amplifier that some cars come with. You will have to move a few wires in the Metra harness around in order to make that work without hacking up the factory harness. In the end, I lost the pins for the power antenna (which I don't have), and the illumination signal (which I was hoping to keep). However, all of the important functions are fine.

Pros: Prevents you from having to modify the factory harness

Cons: Missing a few wires so requires modifying the Metra harness

Very happy with this harness.

Written by: B. from Southern California on April 21, 2014

2006 Mazda MX5
Crutchfield Customer Review (What's this?)

Very happy with the harness. All wire colors matched with the accompanying head unit. Perfect fit with the factory harness.

Pros: fit.

Cons: none.

Worked perfectly

Written by: Hal from Hagerstown, MD on April 19, 2014

Crutchfield Customer Review (What's this?)

The harness worked perfectly.

Pros: Perfect fit.

Cons: none

Great harness

Written by: james from 33952 on April 17, 2014

2004 Mazda 3
Crutchfield Customer Review (What's this?)

Exactly what I needed and had an illumination wire as well

Pros: See above

Cons: None

Great Harness

Written by: Glenn from Atlanta on April 12, 2014

Crutchfield Customer Review (What's this?)

I originally ended up with the wrong harness delivered with my Pioneer head unit. After a quick call with the Crutchfield Tech Support team, they got me squared away with the exact match for my Mazda with a factory subwoofer (very important if ordering for an MPV).

Pros: I loved the pre-spliced wires; made for quick prep-work before my in-vehicle install process. Very pleased with the fact that harness configuration included a specific connect for the vehicle ground wire... took the guess work out of locating a suitable ground location within the dash cavity. I believe this has had lent itself to the excellent HD Radio reception I'm receiving from the unit!

Cons: None.

No more cutting wires

Written by: Anonymous from Cocoa, Fl on April 3, 2014

2002 Mazda MPV
Crutchfield Customer Review (What's this?)

Perfect fit into stock harness. Soldered to the new radio wiring harness. Could not have been easier.

Pros:

Cons:

Easy

Written by: DaleA from Hampton, VA on March 21, 2014

2004 Mazda 3
Crutchfield Customer Review (What's this?)

Very easy to configure.

Pros:

Cons:

Easy as Pie

Written by: David G from Ocala FL on February 26, 2014

2012 Mazda 2
Crutchfield Customer Review (What's this?)

It was exactly what it was suppose to be with excellent quality and performance. The instructions were spot on with the Car and the product was top notch. Thank you Crutchfield for supplying me with quality products from quality Subs

Pros: Everything, Quick fast shipment, spot on product of highest quality

Cons: None :)

Mazda 626 Receiver Harness

Written by: TerryG from Ashtabula, Oh on January 15, 2014

2002 Mazda 626
Crutchfield Customer Review (What's this?)

Excellent color match and ease to work with when soldering and matching up with Kenwood Stereo. Sure beat the old days of the 80's being upside down under the dash with a test light trying to figure out which was what. Looking forward to next install in another vehicle.

Pros: Added bonus with Kenwood stereo.

Cons: none

Mazda Receiver Wire Harness

Written by: JoshB from Denver, CO on January 12, 2014

2002 Mazda Protege
Crutchfield Customer Review (What's this?)

The Harness worked well and made for a clean install. All the wires were properly located for hook up.

Pros: Easy install, worked well, made for a clean install.

Cons: None

Perfect

Written by: Tim S from Vista, CA on January 9, 2014

2013 Mazda 3
Crutchfield Customer Review (What's this?)

Makes it so easy to install an aftermarket stereo. If you're not color blind, then you can use this harness.

Pros: Ease of use.

Cons: Doesn't allow for use of factory steering wheel controls. That requires another harness.

Very Doable

Written by: CDL from Oklahoma on January 8, 2014

2006 Mazda 3
Crutchfield Customer Review (What's this?)

Very Easy to understand and do.

Pros: Anybody can do

Cons:

Mazda Wire Harness

Written by: Will from Phoenix, Az on January 6, 2014

2010 Mazda 3
Crutchfield Customer Review (What's this?)

Worked as advertised. Easy to use instructions.

Pros: none

Cons: none

Stero harnest

Written by: Rbrian89 from Wenatchee wa on December 17, 2013

2006 Mazda 3
Crutchfield Customer Review (What's this?)

Really easy to install good quality wires and comes with instruticons really easy to read

Pros:

Cons:

Metra 70-7904 Receiver Wiring Harness

Written by: Anonymous from Arnold md on December 16, 2013

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

Does exactly what it's suppose too.

Pros: Easy to install

Cons: Not the easiest instructions

Metra 70-7904 Receiver Wiring Harness

Written by: Ted from Minneapolis, MN on December 9, 2013

2012 Mazda 2
Crutchfield Customer Review (What's this?)

Designed to fit perfectly. There is no malfunction at all.

Pros:

Cons:

Mazda wiring harness

Written by: MarkP from Madison, VA on December 2, 2013

Crutchfield Customer Review (What's this?)

Wiring harness worked as designed. Instructions should have included wiring color codes for the car installed. I had to look up online. Otherwise, very easy to install.

Pros: Ease of installation.

Cons: No information on wiring color codes of car being installed in.

Works!

Written by: Lashk from Walker, LA on November 23, 2013

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

Works as promised!

Pros: Everything

Cons: Nothing

harness

Written by: Gary from Bellevue, NE. on October 26, 2013

Crutchfield Customer Review (What's this?)

This is a must have if you want to keep your original wiring should you ever want to put your old unit back in. Makes the new HU a lot easier to install. Takes a little time to do the wiring but can all be done and ready before the install is even started. Installed on my 2010 Mazda MX-5 Miata

Pros: Makes the install easier

Cons: a lot of wire work and may be missing some of the wires like other people including myself found out. So buy 2 of them and you should be ok.

Metra 70-7904 Receiver Wiring Harness

Written by: Anonymous from Weeping Water, NE on October 19, 2013

2005 Mazda Tribute
Crutchfield Customer Review (What's this?)

excellent, works perfect

Pros:

Cons:

Almost perfect

Written by: McGee from Chesapeake, Va. on October 17, 2013

Crutchfield Customer Review (What's this?)

Excellent harness, works perfectly with Bose equipped 2013 MX-5 GT. Unfortunately you will need to purchase at least two for a complete install as it is missing three wires. You can pull the required wires from a second unit to make up for the missing reverse, 1P and 1N.

Pros: Works great

Cons: Missing 3 wires I needed for a complete install of a double din nav unit.

Mazda wiring harness

Written by: Ricky from Winston Salem, NC on September 6, 2013

Crutchfield Customer Review (What's this?)

It fits like a glove

Pros:

Cons: none

great item

Written by: carrie m from wesley chapel, FL on July 30, 2013

2012 Mazda 5
Crutchfield Customer Review (What's this?)

it was fairly easy to just match up the colors and solder them together

Pros:

Cons:

Easy Street

Written by: Gus Nap from Houston, TX on July 18, 2013

2007 Mazda MX5
Crutchfield Customer Review (What's this?)

Easy to install. Easy to understand step by step instructions. This was my first install of a car stereo and my friends and I are very impressed.

Pros: easy to install and a perfect fit.

Cons: None

Metra 70-7904 Receiver Wiring Harness

Written by: d from albuquerque, nm on June 24, 2013

2006 Mazda 3
Crutchfield Customer Review (What's this?)

good instructions, work right

Pros:

Cons:

easy pesy

Written by: PDubLA from LA on June 10, 2013

2001 Mazda Miata
Crutchfield Customer Review (What's this?)

Perfect match! Easy to follow instructions and wiring diagrams to provide a clean and factory looking installation. Love these added features from Crutchfield!

Pros: Easy to follow wiring diagrams

Cons: None

everything worked

Written by: DaveD from Cincinnati on June 6, 2013

2002 Mazda Tribute
Crutchfield Customer Review (What's this?)

Everything worked as designed, I soldered everything and made no mistakes, it all worked the very first time

Pros: worked as designed

Cons: none

Perfect

Written by: macgeek from Charleston, SC on May 24, 2013

2005 Mazda Tribute
Crutchfield Customer Review (What's this?)

Perfect. That sums it up. I remember many years ago cutting the factory connector off and wiring a new head unit it directly, with this harness that is not necessary. match up the wires on both sides, make your crimps or solder joints and plug both ends in. Done!

Pros: This makes it Easy!

Cons: None that i can think of.

Made installing easy

Written by: Kevin from Philadelphia, PA on May 22, 2013

2003 Mazda Protege
Crutchfield Customer Review (What's this?)

Made connecting my new receiver to my 2003 Mazda Protege LX really easy. The wire colors all matched with the receiver wires making it easy to match them up.

Pros:

Cons:

Perfection

Written by: rbprivate1 from Greenwood, MO. on May 20, 2013

2005 Mazda Tribute
Crutchfield Customer Review (What's this?)

Very easy, just spliced color for color soldered and taped connection.

Pros: Perfect match of colors to make up.

Cons: Would have been nice to have solderless connectors.

Does exactly what I wanted

Written by: kls7773 from Odenton, MD on May 20, 2013

2007 Mazda 3
Crutchfield Customer Review (What's this?)

This harness made installing my stereo a breeze! Just match the colors.

Pros: Easy to follow instructions.

Cons: none.

Easy Connection

Written by: The2Arys from Corpus Christi, TX on May 16, 2013

2001 Mazda 626
Crutchfield Customer Review (What's this?)

I was a little nervous about connecting into such a big wire bundle but it worked like a champ! Just match the colors and connect the wires. It worked first try.

Pros: Easy to connect. Just match the colors.

Cons: Said before, but it IS a lot of soldering. It WOULD be nice if there were an adapter plug with the appropriate plugs on each end already made.

Harness

Written by: jackk from Rocklin Ca on May 1, 2013

2004 Mazda MPV
Crutchfield Customer Review (What's this?)

connection to the radipo was easy, could have arrived at my house with many connections alread made!

Pros: easy to solder together

Cons: none

Good Connection

Written by: MO from Edison NJ on March 11, 2013

Crutchfield Customer Review (What's this?)

Plug in perfect, is not too bulky so help to accommodate my new installation perfect.

Pros: exact match

Cons:

great and easy install

Written by: Snowflake from Florida on March 10, 2013

2008 Mazda Mazdaspeed3
Crutchfield Customer Review (What's this?)

installed this in a 2008 Mazdaspeed3 GT really easy to install, was a plug and play after all the wires are connected to each other, all the colors matched so it made it that much easier.

Pros: plug and play

Cons: i needed two more wires for the aftermarket steering wheel controls, had to tap into the factory ones.

worked great

Written by: rob from brentwood on March 4, 2013

2006 Mazda Tribute
Crutchfield Customer Review (What's this?)

Works perfectly

Pros:

Cons:

Easy and Right

Written by: Rev. Beth from Nashville TN on March 1, 2013

2006 Mazda MX5
Crutchfield Customer Review (What's this?)

Easy to install - the right harness for the job!

Pros:

Cons: None

Mazda 3 Wire Harness

Written by: Qazar from Austin, TX on February 9, 2013

2012 Mazda 3
Crutchfield Customer Review (What's this?)

The colored wires on the Pioneer wire harness were a perfect match for the colors on this harness (although a little brighter or dimmer) which made it easy to keep track of the connections. I used crimp-on butt connectors with heat shrink. It took about half hour to finish the job and the new stereo worked the first flawlessly the first time it was connected. Definitely a time saver.

Pros: All the wire colors matched and it came with my order. No hunting for parts.

Cons:

Metra 70-7904 Receiver Wiring Harness

Written by: Izzy from Tampa, Fl. on January 27, 2013

2013 Mazda 6
Crutchfield Customer Review (What's this?)

Was impressed everything fit well. Thought the wires might be a little thicker and pre cut.

Pros:

Cons: Wires to thin.

'02 Protege Radio Wiring Harness

Written by: Chris from Naples, FL on January 4, 2013

2002 Mazda Protege
Crutchfield Customer Review (What's this?)

I works just fine.

Pros: The plug fit the car's system and all the needed wires were there.

Cons: A lot of soldering. A compatable plug on each end would have simplified the installation.

Satisfied customer

Written by: Phi_alpha from Greenville, NC on January 3, 2013

2008 Mazda 5
Crutchfield Customer Review (What's this?)

Crutchfield takes the pain out of completing a stereo install by yourself by providing the right harness when you buy a stereo from them. The instructions and harness helped me get it done. I wish the steering wheel controls for the stereo would work with this harness!

Pros: Free with purchase

Cons: Doesn't retain radio controls on steering wheel.

It's OK

Written by: Fausfez from Sacramento, CA on October 8, 2012

2001 Mazda 626
Crutchfield Customer Review (What's this?)

easy to install, color code is easy to figure out. It does the job

Pros:

Cons:

Metra 70-7904 Receiver Wiring Harness

Written by: Anonymous from Los Angeles, CA on September 6, 2012

2001 Mazda Miata
Crutchfield Customer Review (What's this?)

Perfect. Worked well and instructions from the harness kit works to the tee. I had a bunch of 3M wire connectors that does not require splicing and I was done in half hour. I had to double check make sure I'm connecting the right colors.

Pros:

Cons:

Harness

Written by: ERK from Georgia on August 24, 2012

2002 Mazda Millenia
Crutchfield Customer Review (What's this?)

This product worked fine

Pros:

Cons:

Metra 70-7904 Receiver Wiring Harness

Written by: Anonymous from NY on August 23, 2012

2002 Mazda Protege5
Crutchfield Customer Review (What's this?)

Easy,worked like a charm... I recommend getting the Posi cconnectors. They are very useful

Pros:

Cons:

Metra 70-7904 Receiver Wiring Harness

Written by: MiataGuy from Dayton, OH on June 28, 2012

Crutchfield Customer Review (What's this?)

Perfect adapter and excellent instructions

Pros:

Cons:

Worked great!

Written by: William G. from Marshall, NC on June 17, 2012

2005 Mazda Tribute
Crutchfield Customer Review (What's this?)

This wiring harness worked great in our 2005 Mazda Tribute. The colors matched up with the stereo we bought and we used wire crimp caps instead of soldering. It went together perfectly and quickly.

Pros:

Cons:

Easy install

Written by: Alex from FL on June 4, 2012

2002 Mazda Protege5
Crutchfield Customer Review (What's this?)

Easy install and everything works with my Mazda Protege5. Other reviews complain that connectors are not included...it has bare wires on one end...of course you'll need to use crimps or solder. An obvious requirement in my book. It wired up easy, and most of the colors even matched my JVC head unit. The included instructions were easy to understand and spot on!

Pros: clear instructions much better than cutting into your car's wiring!

Cons:

Worked perfectly

Written by: John from Seattle WA on May 28, 2012

2003 Mazda Protege5
Crutchfield Customer Review (What's this?)

All in all, a great product. Was the correct unit for the pigtail that plugs into the back of the stock unit. The biggest thing was stripping the wires of the HU's pigtail, splicing, soldering and taping. Once done, it was as simple as click, click, plug in the antenna lead and slide the HU in, badda boom, it's installed.

Pros: makes installation of an aftermarket HU so much easier and allows you to not butcher the stock wiring harness for such a project.

Cons: None

Must Have!

Written by: bmo from Colorado on May 28, 2012

2006 Mazda MX5
Crutchfield Customer Review (What's this?)

Must have accessory if you're swapping out the factory head unit. Steering wheel radio controls become inactive. Otherwise, great time saver.

Pros: Speeds installation considerably.

Cons: Loss of steering wheel controls.

Would like more

Written by: Glennb from Concord NH on May 17, 2012

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

This Wire Harness works well for standard installs

Pros:

Cons: If you need to install a steering wheel control module you need to cut into the factory harness for the two wires to complete the installation. You would think they could have made these wires a part of this harness to make it easyier.

Mazda Receiver Wire Harness

Written by: Todd B from Covington, LA on May 7, 2012

2007 Mazda MX5
Crutchfield Customer Review (What's this?)

No problems, works as described.

Pros:

Cons:

Mazda wire harness

Written by: Used in 08 Mazda 3 from San Jose, CA on May 3, 2012

2008 Mazda 3
Crutchfield Customer Review (What's this?)

It's a wiring kit, and it works. Plug and play! BTW keep it easy, don't solder just use wire crimp connectors.

Pros:

Cons:

Works with mostly everything, no wires for CANBUS or steering wheel co

Written by: Ex. from Capitol Heights, MD on April 23, 2012

Works and color matches with my Pioneer P3400BH. Doesn't have a pin for the red wire for the steering wheel controls or the violet wire that needs to be grounded for the steering wheel adapter to work.

Pros: Color matches with my HU

Cons: No steering wheel controls wires

Metra 70-7904 Receiver Wiring Harness

Written by: Anonymous from Geneva, NY on April 3, 2012

2003 Mazda Protege5
Crutchfield Customer Review (What's this?)

Very easy, all the colors matched to my pioneer stereo.

Pros: All the wires are labeled right on the wire.

Cons:

Mazda Protege

Written by: RobertoP from Seattle on March 19, 2012

2002 Mazda Protege
Crutchfield Customer Review (What's this?)

The hanses fit, but there are no connectors provided to mate it to the radio harness. Crimp to fit connectors should have been included. Soldering was recommended in the instructions provide with the harness, but not mentioned in the Crutchfield instructions. Required a trip to the parts store and a purchase of a tool and connectors.

Pros: Works

Cons: Requires buying connectors to make the proper connection to the radio.

Easy

Written by: Phil M from Las Vegas on March 17, 2012

2005 Mazda Tribute
Crutchfield Customer Review (What's this?)

Hooked up a new head unit to a 2005 Mazda Tribute with the 7-speaker system. Easy as pie.

Pros: So simple a ______________ could do it.

Cons:

Made wiring a snap, But Could Be Better

Written by: Old School from Seattle, WA on February 27, 2012

2007 Mazda 5
Crutchfield Customer Review (What's this?)

This came included with my radio kit, and overall made the install a breeze. I was able to do almost the entire wiring job at my workbench inside and not in the car. If they had only put two more wires into the plug, I could have done the whole job indoors, and it would have been a perfect plug and play job. (are you listening Crutchfield) If you install the AWSC there is a Data and 12v gnd wire on the car side plug, that is missing on the adapter side. (I had to splice into the car harness to make up for this.) I believe most all of the Mazda 5s have the wheel controls, and assume most would want to use them. Plus the AWSC recognized this car, and our JVC. No programming needed. You could install the radio in the Dash Plate, Wire the plug and AWSC, and have everything done and ready to go, all on the the workbench. Just plug in and go.

Pros: Majority of wire colors matched my new JVC install.

Cons: Did not have any pin/wires installed for the AWSC install.

so easy a geico salesman could do it

Written by: DGF from Atlanta, GA on February 27, 2012

2007 Mazda MX5
Crutchfield Customer Review (What's this?)

This harness was so easy to install. The wire colors all match the pioneer cables, so pretty much foolproof.

Pros: super easy. colors match pioneers cables. included with radio. Free is good.

Cons:

Check before install AWSC!!!

Written by: Stan from Chicago on February 1, 2012

2006 Mazda MPV
Crutchfield Customer Review (What's this?)

Everything works if you are using it only for radio but if you want to use your radio with AWSC check the pins!!!. This harnes has a factory error. Pins responsible for wheel control are made as a mirror. It means that correct for Mazda MPV 2006 should be pins 1(P) and 2(NC) but factory installed (in aftermarket harness)are pins 4 and 5. It took me all day to figure out that originally made harnes is wrong. I remake the harness (I used small long nose pliers), hook up the AWSC module and everything started work as it supposed to.

Pros:

Cons:

Wiring Harness Adapter

Written by: R-L from Los Angeles on February 1, 2012

2006 Mazda 5
Crutchfield Customer Review (What's this?)

Saves a lot of headache when adapting a post-market car stereo to your car.

Pros: Plenty of lead(in case you make a mistake)

Cons: Could use a tool and instructions on how to move a pin. I had to move one to make this work with my stering-wheel remote adapter without cutting the car's actual harness.

Perfect match

Written by: LouisG from Richmond, VA on January 27, 2012

2001 Mazda Protege
Crutchfield Customer Review (What's this?)

Made installation a breeze.

Pros: Wires were labeled exactly as they needed to be to match correctly.

Cons: Only a suggestion: The antenna lead is only so long, and that makes it harder to install. Could you include a small (6") antenna lead extender? That would avoid some scraped hands!

Adapter harness

Written by: Jim from Loveland on January 21, 2012

Crutchfield Customer Review (What's this?)

Made the installation of aftermarket radio an easy job.

Pros: It works great

Cons: My only suggestion would be to mention that both amplifier turn on and power antenna wire need to be connected to blue external equipment wire, or you get lousey radio reception - especially on AM.

Metra 70-7904 Receiver Wiring Harness

Written by: Daveinpt from Port Townsend,WA on January 17, 2012

Crutchfield Customer Review (What's this?)

The good news is that it works.

Pros: Everything was there to make it work.

Cons: The instructions were not particularly clear. I would have preferred an overall (for the entire installation) step by step that included the entire process. There were one less lead on the unit and it was unclear just what to do about that.

Mazga 3 harness

Written by: Walt from Cocoa, Florida on January 17, 2012

2006 Mazda 3
Crutchfield Customer Review (What's this?)

The radio was wired in quickly into the harness. I had trouble getting the steering wheel adapter wired in, however. Two QUICK calls to Crutchfield had me up and running. The manufacturer had left out critical information about wiring the adapter into the harness.

Pros: Saves a LOT of time, very straight-forward to install

Cons: steering wheel adapter instructions were lacking, not the fault of Crutchfield nOR the wring harness

color-coded perfection

Written by: p from Loganville, GA on November 13, 2011

2002 Mazda Protege5
Crutchfield Customer Review (What's this?)

The colors between the harness and radio were a perfect match. The was one less on the radio and it was easy to determine power antennae was the difference and not needed.

Pros: color coding made it so easy

Cons:

Wiring made easy

Written by: Randy from Glendale, Az on September 13, 2011

2005 Mazda Tribute
Crutchfield Customer Review (What's this?)

Could not make the installation look more professional. Had no problem matching the wires up, i choose to solder and use heat shrink instead of twist caps and tape. It plugged in perfectly with the tributes harness and made life easy. Will always use these kind of connection instead of cutting wires. I recommend everyone to use these adapters.

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Metra 70-7904 Receiver Wiring Harness

Written by: Bill L from Infianapolis IN on September 11, 2011

2007 Mazda 3
Crutchfield Customer Review (What's this?)

Makes the change very clean. Would be better if all the pins were installed for future changes.

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2002 Tribute Owners

Written by: Russ C. from Meadville, PA on June 9, 2011

2002 Mazda Tribute
Crutchfield Customer Review (What's this?)

I bought this harness for an '02 Tribute with a manufacturing date of 08/01. Unfortunately, when I removed the factory stereo I discovered that my car was wired with the 2001 style harness. Crutchfield customer service was extremely helpful and sent me the correct harness an no extra cost. Thanks a lot, guys.

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mostly worked O.K.

Written by: Anonymous from Texas on April 15, 2011

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

The overall connection worked fine, the plug was a little picky during plugging in time, the pins in the connector are a little loose so it takes a little jiggling to get them lined up. There were 2 pins not included that I needed to support the steering wheel volume control between my Kenwood stereo and the Axxess ASWC. I ended up buying another connector and taking two of those pins out. Metra should up their pin count to support that!

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Metra 70-7904 Receiver Wiring Harness

Written by: pedro from peabody ma. on March 11, 2011

2010 Mazda 3
Crutchfield Customer Review (What's this?)

perfect fit to my car oem plug

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Worked fine, needed some tweaking

Written by: Ol' Beaks from Raleigh NC on February 21, 2011

2006 Mazda 3
Crutchfield Customer Review (What's this?)

This wiring harness was good and worked well until it came time to connect a Kenwood KDC-x994 to a SWI-JACK steering wheel control adapter. The adapter required tapping into pins 9 and 10 of the car's harness, which had no pins matching in this adapter. It turns out that the 9 and 10 pins on this wire harness were on the opposide side of the adapter (not a mirror image) so the pins did not match. I went around town asking if someone could give me some pins but had no luck. Eventually I simply pulled the pins very hard and they popped out of the wire harness, then plugged them into the appropriate slots for pins 9 and 10, and everything worked fine. This avoided me having to tap into the wires behind my car's harness. Crutchfield tech support said that they couldn't help me with the harness they sent, and that I would have to tap into my car's wiring; I'm glad I didn't have to do that.

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Perfect for radio, but need more wires/pins if doing steering wheel co

Written by: Jason from Oak Hill, VA on January 30, 2011

Crutchfield Customer Review (What's this?)

Adapter fit perfectly in stock wiring harness. However, I had to repurpose two wires on the adapter to support the pinout for the steering wheel control adapter (PAC SWI-PS). The Orange and Blue/white wires aren't used on my 09 Mazda 5, and with a eyeglass/precision flathead screwdriver I was able to coax them out of there original pins to use for the adapter + adapter ground pins. They were quite difficult to remove, and it would have been nicer if the harness included a couple pins so you can easily attach your own wires when needed.

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Mazda Wire Harness

Written by: Matt K. from Macedonia, Ohio on December 5, 2010

Crutchfield Customer Review (What's this?)

Great product...

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Metra 70-7904 Receiver Wiring Harness

Written by: DavidB from Harrisburg, PA on November 28, 2010

Crutchfield Customer Review (What's this?)

Works great, only way to improve it would be to add the two wires required to hook up the steering wheel controls. The way I got around this was to order an additional harness and pull the two wires I needed out of the second harness and add them to the first harness. By doing this you eliminate having to splice into the actual wiring of the vehicle. (In my case a 2008 Mazda Miata MX-5.)

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Metra 70-7904 Receiver Wiring Harness

Written by: Mikey from Orlando, FL on November 23, 2010

2010 Mazda 3
Crutchfield Customer Review (What's this?)

Worked exactly as described. I have the 10spkr Bose factory system and all spkrs work thru aftermarket harness...easy install.

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Fits but no wires for steering wheel remote

Written by: TimE from Wakefield, MA on November 15, 2010

2006 Mazda 3
Crutchfield Customer Review (What's this?)

Nice product overall but I would have liked if it had included a pass through for the 2 additional wires required to hook up the factory steering wheel controls. I needed to cut factory wires and splice into them with a remote adapter. Spent a couple of hours trying to figure that one out but finally called Crutchfield and they were able to help me out right away :)

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PERFECT Fit!

Written by: Ray D. from Jacksonville, FL on October 5, 2010

2004 Mazda Tribute
Crutchfield Customer Review (What's this?)

Worth every penny! Oh yea- it came with the kit for free! Even better. Perfect fit, color match on wires, everything! Thanks Crutchfield!

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Fits perfectly and it was free

Written by: SamM from Richmond, VA on September 10, 2010

2003 Mazda Protege5
Crutchfield Customer Review (What's this?)

Being a bit on the dour side, I usually like to have at least one critical comment, but there isn't anything wrong with this harness. Even the green used was light enough that my poor eyes didn't have a problem distinguishing the green green/black wires.

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No reason to complain

Written by: whyde from Austin, TX on July 2, 2010

Crutchfield Customer Review (What's this?)

What can I say, there's no reason to take any stars off when it works perfectly.

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Perfect fit

Written by: Anonymous from Exton, PA on June 16, 2010

2005 Mazda MPV
Crutchfield Customer Review (What's this?)

Perfect fit. As long as you or a friend can do basic soldering there's no issue.

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very good product

Written by: csprings from New Jersey on June 11, 2010

2007 Mazda MX5
Crutchfield Customer Review (What's this?)

Very good instructions and well made product it made the install very easy.

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Pretty good

Written by: Anonymous from Colorado on May 22, 2010

2007 Mazda CX-7
Crutchfield Customer Review (What's this?)

Works fine but the wires for the steering wheel radio controls are not wired through the harness and it sure would have been nice since I installed a PAC SWI-JACK. That little piece caused me a LOT of time and trouble. (Mazda CX7)

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Great Item

Written by: mediacop from Westchester, NY on March 29, 2010

The item works as advertised and the directions were very clear and thorough. Also, customer support was extremely helpful.

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Perfect fit!

Written by: Ivan from Miami, Fl on February 22, 2010

2003 Mazda Protege
Crutchfield Customer Review (What's this?)

At first I was confused, frightened by all the wires. But this harness is super simple. Match color to color, and attach.Slide radio into kit. Voila!

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Works great!

Written by: Anonymous from Broken Arrow, OK on October 18, 2009

2002 Mazda Miata
Crutchfield Customer Review (What's this?)

The wire colors matched the wires of the receiver harness. I chose to solder the wires to the receiver harness, so it took a little longer. Once that was done, it worked perfectly.

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2005 Mazda MPV

Written by: Michael from Clayton, NC on April 13, 2009

2005 Mazda MPV
Crutchfield Customer Review (What's this?)

This wire harness's plug mated well with the factory plug and was also easy to connect to my aftermarket stereo. The instructions were easy to read and the wire colors were consistant with modern stereo harness colors too.

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Very easy installation

Written by: Pat from Cleves, OH on April 13, 2009

2004 Mazda MPV
Crutchfield Customer Review (What's this?)

I was impressed with how easy this made the installation of my stereo. While connecting the wiring harness was the most difficult part, that just shows you how easy the rest of the install was. I wouldn't attempt install without this.

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Perfect fit!

Written by: Cristino from Bayamon, Puerto Rico on April 11, 2009

2008 Mazda 3
Crutchfield Customer Review (What's this?)

Just matched the colors of the plug wires to the radio wires for a perfect match, took no more than 10 minutes... The only thing is that I had to add 2 more pins to the connector to be able to use the steering wheel controls of my Mazda 3 with a SWI-JACK without having to splice the factory wires. No big deal... :-)

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Worked Fine

Written by: Peter from NJ on February 14, 2009

Crutchfield Customer Review (What's this?)

This was easy to use and install. The instructions were great. I used bullet connectors to connect mine to my radio.

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Great Job

Written by: Greg from Redding, CA. on February 12, 2009

2001 Mazda Miata
Crutchfield Customer Review (What's this?)

This is the best part of the installation. It worked perfectly, and this was my second car radio install in my life (a mechanic I am not!). While the colors were a bit different in radio (purple different shade), the rest I soldered easily. After that it was snap snap and together. The bluetooth connector was a bit difficult, I had to work it until it snapped into place. After that the unit works great.

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No Brainer

Written by: Mike V. from Northeast on November 6, 2008

Crutchfield Customer Review (What's this?)

You simply match the colors to the radio harness (all pretty much standard these days anyway?) and plug-in is simple - almost. I found that I had bent a couple of the tiny pins (power antenna lead) during the initial conncetion. Easily fixed and more of a Mazda issue than anything Crutchfield did (they are just matching the OEM hardware). About the only possible improvement would be to include some tidy splice tubes (not those bulky crimp connectors that they offer) > '02 Miata LS

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Easy install, but needs more connections

Written by: Scott from Vermont on November 2, 2008

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

It's a wiring harness, what more is there to say. Instructions were excellent as usual for Crutchfield. It would be even better if it had wires for the steering wheel controls for use with one of the adapters Crutchfield sells. As it is, I'll need to add my own pins to be able to avoid cutting my car's wiring.

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Just a wiring harness!

Written by: Andrew from Stockton, CA on October 29, 2008

2002 Mazda Protege5
Crutchfield Customer Review (What's this?)

Not much to say here. It's a wiring harness, and it does the job just like any other wiring harness. I'm just glad it was included for free!

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Just what the doctor ordered

Written by: Mike from Southern California on July 15, 2008

2006 Mazda 5
Crutchfield Customer Review (What's this?)

I usually don't like to work installing audio equipment, but these guys make it sooooo easy!! The harness matches the pinout and "standard" radio wiring color to a "T"!! It took very little time to get things hooked up and working beautifully! I like it that they provide all the documentation you could need, and stand by their product (and their customers). Now, whenever anyone asks me about installing a stereo or other device into their vehicle, I advise them to go to these guys FIRST!!

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Painless Wire Harness

Written by: Michael from Sacramento, CA on October 6, 2006

This wire harness make it so easy to wire an aftermarket deck to your car. Everything is color coded and it only took me 10 minutes to wire up my deck. This fit great in my 07 Mazda 3 sedan. Would recommend to anyone who owns a Mazda. Thanks Crutchfield!

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Details

Hands-on research

What's in the box?

Product Research

Features

Crutchfield Wiring Harness: Crutchfield wiring harnesses prevent you from having to cut your vehicle's factory radio plug when replacing your factory radio with an aftermarket head unit. Simply solder or crimp the Crutchfield wiring harness to your aftermarket head unit's harness (solder & crimps not included), plug the aftermarket head unit's plug into the rear chassis of the aftermarket head unit, and plug the Crutchfield wiring harness into your vehicle's factory radio plug.

Note: Installation tools, hardware, & accessories are not included & sold separately. Please see the Accessories tab for recommendations & availability.

Wiring Notes: If the Crutchfield wiring harness is not equipped with a ground wire, you will need to ground the aftermarket head unit's ground wire to the metal chassis of your vehicle. Some vehicle's may require you to bypass the vehicle's factory amplifier (in another location from factory radio) or hardwire certain connections. If your vehicle is equipped with factory steering wheel controls, an additional adapter is required & sold separately.

Wire Code Chart:

Wire Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Black Ground
Blue Power Antenna
Blue/White Amp Turn-On
Orange Illumination
White Left Front Speaker +
White/Black Left Front Speaker -
Gray Right Front Speaker +
Gray/Black Right Front Speaker -
Green Left Rear Speaker +
Green/Black Left Rear Speaker -
Violet Right Rear Speaker +
Violet/Black Right Rear Speaker -

The Crutchfield Car Selector: Please visit the Crutchfield Car Selector for your specific type of vehicle.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Accessories
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Needed it to connect my radio. [ Joseph  Feb 12, 2016 ]

2 questions already asked

I don't think the pin type makes a difference. The connectors supplied with the receiver will mate with the auto mobile and existing receiver connector interfaces. That's why Crutchfield will want the details of how you plan to use the receiver. [ THOMAS  Aug 25, 2014 ]
i really dont know....i ordered the part and had it professionally installed so to be honest, I didn't pay attention. I'm sorry. Hopefully you can find the answer. Call Metra maybe? Dan [ DANIEL  Aug 22, 2014 ]
16 or 18 gauge. It's the same size as most house stereo speaker wires. [ JOSHUA  Mar 01, 2014 ]
I don't have it in front of me currently, but like most harnesses, I would say 18awg would be pretty approximate. I hope this helps. [ ANDREW J  Mar 01, 2014 ]
It was 18 gauge [ MICHAEL J  Feb 28, 2014 ]
appears to be 20 AWG, but that is just an educated guess. [ Dale  Feb 28, 2014 ]
It's been installed already do I cannot say for certain...my guess is that it about 18 or 22 gauge....standard issue. [ PAUL  Feb 28, 2014 ]
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