Metra 70-9221 Receiver Wiring Harness

Connect a new car stereo in select 1999-09 Volvo vehicles

Item #: 120709221

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20 Reviews

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Metra 70-9221 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: This harness doesn't include connections for illumination or dimming, so you may need to make those connections manually, depending on your new receiver.

  • 12V constant power
  • 12V switched power
  • chassis ground
  • power antenna turn-on
  • left front speakers +/-
  • right front speakers +/-
  • left rear speakers +/-
  • right rear speakers +/-

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.

Metra 70-9221 Receiver Wiring Harness Reviews

Average Customer Review:

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Written By Dave, Wisconsin on Friday, October 23, 2015

Crutchfield Customer Review (What's this?)

Adapters make life sooooooo much easier!

Perfect fit

Written By Leeda, Irvine, CA on Wednesday, June 10, 2015

Crutchfield Customer Review (What's this?)

Perfect connection for my 2001 Volvo S60. Used crimp caps to make wire connection. Butt connectors don't hold the hires together well enough.

Pros: Colors matched up with original wires. Wire tips pre-stripped for easy pull off

Cons: none

Metra 70-9221 Receiver Wiring Harness

Written By the_mad_pumpkin, Hattiesburg, MS on Monday, March 02, 2015

Crutchfield Customer Review (What's this?)

Works great for a Volvo S60!

Pros: Fits and works as intended. Comes with great instructions but could get away with no instructions- it's that easy.

Cons: none

Metra 70-9221 Receiver Wiring Harness

Written By Anonymous, charleston south carolina on Tuesday, September 02, 2014

Crutchfield Customer Review (What's this?)

Easy to plug in the stock radio harness

Metra 70-9221 Receiver Wiring Harness

Written By Anonymous, 08520 on Wednesday, March 19, 2014

Crutchfield Customer Review (What's this?)

Worked fine

Metra 70-9221 Receiver Wiring Harness

Written By HowieB, Niantic il on Friday, January 17, 2014

Crutchfield Customer Review (What's this?)

Great product don't try to instal a radio without it as this saves hours

Pros: Easy great instructions

Cons: None

Did what it is supposed to do

Written By RAW, Kure Beach on Wednesday, October 30, 2013

Crutchfield Customer Review (What's this?)

couldn't have done it with out you!

Harness this

Written By M P, Chesterfield, NJ on Saturday, September 21, 2013

Crutchfield Customer Review (What's this?)

This makes replacement of original radio wiring simple.

Pros: Color coded for easy install. Easy installation Quality comparable to original equipment

Cons: None


Written By Honda18252, Tamaqua, pa on Monday, September 16, 2013

Crutchfield Customer Review (What's this?)

Piece wired right in and worked like a charm. Simple as that, just follow provided instructions.

Pros: Worked perfectly

Cons: None.

Volvo Receiver Wire Harness

Written By BrianM, pompano beach, fl on Monday, May 27, 2013

Crutchfield Customer Review (What's this?)

i think the wire harness is perfect. had no issues with install and stereo sounds great.

Pros: easy plug in, easy hook up, no issues

Cons: none to be found

Helpful for Installation

Written By 04S60R, Central Ohio on Saturday, May 04, 2013

Crutchfield Customer Review (What's this?)

Plugs fit and Wire Colors matched up

Pros: Enabled me to solder up this and the radio harness in the basement instead of trying to make good connections in the Car

Cons: The Green connector only includes 4 wires, Constant Power, Keyed Power, Ground, Antenna Power

Volvo Receiver Wire Harness

Written By Anonymous, Oregon on Saturday, May 04, 2013

Crutchfield Customer Review (What's this?)

This harness works great! I was able to soldier the converter harness to the aftermarket stereo harness and make a flawless easy to connect and disconnect plug to the stock Volvo stereo harness. Now if I need to remove my stereo for any reason, all I have to do is unplug it instead of having to cut the wires and destroy the stock harness.

Pros: Easy connections, Able to soldier wires,

Tight Fit.

Written By John, Omaha, NE on Sunday, April 28, 2013

Crutchfield Customer Review (What's this?)

Too big to fit behind the radio....but I made it fit. Also, the remote wire didn't work to the subs, so I had to hook it up to the constant power....annoying but not to big a deal.

Pros: Good price

Cons: Way too big.

Would not fit in my Volvo S60

Written By FrankG, Blacksburg, VA on Tuesday, April 16, 2013

Crutchfield Customer Review (What's this?)

I was not able to use this harness. My 2007 Volvo S60 had way too little room behind the radio compartment to fit the large connectors. I ended having to cut all the connectors out (both the OEM and the harness connectors) and solder all the connections. Even then it was a tight fit!

Pros: It (would have) made the installation easy.

Cons: Would not fit in the space Volvo allocated between the radio compartment and the bulkhead.

Volvo S40 requires additional harness

Written By ChrisW, Midwest on Friday, December 14, 2012

This harness is necessary for the HU power, ground, ect. but you will need an additional harness for the factory amp interface found in the 99-03 Volvo S40's. Without this additional harness, only the dash tweeters will work. The alternative is bypassing the factory amp and running new speaker wire in a (slightly over-engineered) Volvo. Huge pain. You could cut the interface plug open and test wires untill you have sound in all four doors. Huge pain.

Pros: It does fit and works fine. It is the power, ground, remote and dash tweeters.

Cons: I wish I had known I would have to scour the web for the wierd extra harness for the door speakers to work. The factory amp interface is a strange cd changer -esque looking thing that is very difficult to find any kind of wiring diagram for. If you have a whole day to kill, bypassing the factory amp and running new speaker wire to the HU would work. The extra harness is much faster and a cleaner install overall in my opinion.

Antenna adapter

Written By Patrick, USA on Thursday, August 09, 2012

Crutchfield Customer Review (What's this?)

It worked.

Pros: Easily adapts from Volvo antenna to JVC radio.

Cons: The plug that fits into the radio seemed a very little bit too small, so the fit wasn't as tight as I'd like. As I installed it I was wondering if would eventually vibrate loose. It was not bad, just not a perfect fit.

Metra 70-9221 Receiver Wiring Harness

Written By Ben, Danville,Ky on Thursday, June 28, 2012

Crutchfield Customer Review (What's this?)

Works great

Does not Work with S40's

Written By Anonymous, Texas on Friday, November 06, 2009

When I first got the only two speakers in my car worked. Found out that s40's come with an Factory amp. I Bought an adaptor. All is well, but beware and save your self head aches, s40 until 03 i believe come standard with an amp. Fyi,

Thumbs up

Written By Chris, Littleton, CO on Sunday, April 26, 2009

Crutchfield Customer Review (What's this?)

Worked great in my '01 V70, no issues. I picked up an extra stereo frame from a junkyard, so I was able to install the stereo into the dash adapter and wire it on the bench, and did the stereo swap in about 5 minutes.

Metra 70-9221 Receiver Wiring Harness

Written By Derek, Dana Point, CA on Sunday, November 09, 2008

Crutchfield Customer Review (What's this?)

I am a beginner at wiring, so I took this challenge on, these really made it easy, all color coded. Just matched like colors, and plugged it in, very easy, Crutchfield makes install very easy.

Hands-on research

What's in the box?

Download owner's manual

  • 7" Power harness
  • 7" Speaker harness

Product Research


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:

(Power Harness)

Wire Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Black Chassis Ground
Blue Power Antenna

(Speaker Harness)      

Wire Color Function
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.

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