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Metra 70-9221 Receiver Wiring Harness

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

Item # 120709221

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

Find what Fits your car

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

Item # 120709221

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About the Metra 70-9221 Receiver Wiring Harness

Metra 70-9221 Receiver Wiring Harness

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

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 +/-

What's in the box:

  • 7" Power harness
  • 7" Speaker harness

Customer reviews

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Metra 70-9221 Receiver Wiring Harness Reviews

Average Customer Review(s):

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Crutchfield response

More details on the Metra 70-9221 Receiver Wiring Harness

Stacey B.

Product Research


Metra Wiring Harness: Metra 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 Metra 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 Metra 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 Metra 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 -

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Customer Q&A

Crutchfield asked: Why did you buy this?
it was recommended [ ROBERT  Jan 22, 2019 ]
To be able to connect radio to car [ Steve  Aug 09, 2018 ]
Custom for the vehicles wiring. [ GARY  Dec 17, 2017 ]
The days of trying to splice into the factory harness are long over. Install is made very easy with this adapter and identifies the correct wires and when you sell and want to remove the radio just unplug and plug in old head unit. That simple. [ shizzavip  Dec 10, 2017 ]
Replacing a factory unit in a Volvo. [ Benjamin F.  Nov 26, 2017 ]
Came in the order [ Carlo  Oct 19, 2017 ]
Needed to replace the radio. Much cheaper than other places [ Aaron  Jul 24, 2017 ]
I need it to install an after market stereo in my 2002 volvo s60 [ michael  Jun 02, 2017 ]
Recommended as part of installation kit for purchased stereo at fantastic price [ Shea  Apr 19, 2017 ]
Needed [ Dannie  Apr 14, 2017 ]
You are the only one close to me who carris this item [ Frank  Apr 11, 2017 ]
To use factory wiring. [ MILTON  Feb 18, 2017 ]
Volvo wire harness makes this a necessity. [ Richard  Dec 19, 2016 ]
Part of the install kit for my car... as I understand it, I need this to install my new stereo. [ William  May 27, 2016 ]
To simplify installation [ Tadahiro  May 01, 2016 ]
suggested to go with purchase [ Peter  Apr 22, 2016 ]
Makes install super simple! [ David  Feb 17, 2016 ]
Great color. [ Chris  Feb 14, 2016 ]
Easy installation [ Javonte Naquan  Jan 27, 2016 ]

2 questions already asked

Is an antenna adapter included with this kit? Is an antenna adapter even required?
[ Marko  Jul 15, 2017 ]
2 answers
The antenna adapter may be required. If your Volvo does not have navigation then you will need: If your Volvo has navigation we unfortunately have not researched that model. Once you add your vehicle information on the website and add a receiver you will be offered a package of gear at a discount with your receiver purchase. You can check to be sure what fits your vehicle by using our Outfit My Car tool: Please contact an Advisor by phone (1-800-324-9695) or online chat if you have further installation questions.
[ Kenny  Jul 18, 2017 ]  Staff
This will depend largely on your vehicle. For details on installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on what you will need for an installation.
[ Kenny  Jul 17, 2017 ]  Staff
when this harness was installed, my subwoofer(s) do not work. They are, like all the other speakers, are factory stock. What might the issue be?
[ Ted  Aug 24, 2014 ]
1 answer
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: Or try our online support center:
[ Krissy  Aug 24, 2014 ]  Staff

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