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Metra 70-7550 Receiver Wiring Harness

Connect a new car stereo in select 1994-2012 Nissan and Infiniti vehicles

336 Reviews | 5 questions - 10 answers

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Item # 120707550

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

Metra 70-7550 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 saves installation time since you won't have to cut factory wires individually, and this also enables you to re-install the factory radio if needed. 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: You will need to connect the harness's ground wire and the receiver's ground wire to your vehicle's chassis.

  • 12V constant power
  • 12V switched power
  • chassis ground
  • amplifier shield ground — connects to your new receiver's chassis
  • power antenna turn-on
  • amplifier turn-on
  • illumination
  • left front speaker +/-
  • right front speaker +/-
  • left rear speaker +/-
  • right rear speaker +/-

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.

Spend the extra money and have Crutchfield splice for you. Wish I had.

Anonymous, Roanoke, VA

What's in the Box:

  • Power/Front speaker harness
  • Rear speaker harness

Metra 70-7550 Receiver Wiring Harness Reviews

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(336 Reviews)
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Hands-on research

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/Front Speaker Harness)

Wire Color Function
Red +12 Volt Accessory
Orange Illumination
Empty (none)
Yellow +12 Volt Constant
Blue Power Antenna
Gray Right Front Speaker +
Gray/Black Right Front Speaker -
White Left Front Speaker +
White/Black Left Front Speaker -

(Speaker Harness)

Wire Color Function
Empty (none)
Blue/White Amplifier Turn-on
Green Left Rear Speaker +
Green/Black Left Rear Speaker -
Violet Right Rear Speaker +
Violet/Black Right Rear Speaker -

Wiring Note: This harness has no ground wire; the new radio must be grounded to the vehicle chassis.

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

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

To hook up the radio [ Falicia  Jun 15, 2017 ]
Not sure if the existing harnesses would withstand transferring to the new Kenwood,. [ George  Jun 12, 2017 ]
Easy to install my stereo [ Rico  Jun 07, 2017 ]
had to have it. [ timothy  Jun 05, 2017 ]
Replacing factory unit. [ Johnny  May 30, 2017 ]
free [ Ryan  May 22, 2017 ]
was free [ Tim  May 22, 2017 ]
No need to cut any wires, just plug nd play [ Miriam  May 16, 2017 ]
No need to cut the original wires to fit the head unite or player. [ humberto  May 05, 2017 ]
These make installation so much easier. You can match the colors, twist them together then plug the whole thing in! [ Chris  Apr 29, 2017 ]
Needed to insure a nice install without clipping factory wiring [ TRAVIS  Apr 23, 2017 ]
It was offered for installation. [ Gilbert  Apr 17, 2017 ]
Free with the radio I ordered [ Jason  Apr 14, 2017 ]
Better than splicing wires [ Cornelius  Apr 10, 2017 ]
It was the only option. [ geoff  Apr 03, 2017 ]
So much easier than cutting and splicing into factory wires. [ Shane  Apr 02, 2017 ]
Needed for the install of a new car radio. [ Roy  Mar 29, 2017 ]
I needed it [ Cindy  Mar 29, 2017 ]
No wire cutting. [ JOSHUA  Mar 26, 2017 ]
Seamless Fit [ Alex  Mar 14, 2017 ]
Just read the simple, straight-forward directions. A Crutchfield install is always easy. :) [ Frank  Mar 13, 2017 ]
Looks like it will make the installation easier. [ JEFFREY  Mar 05, 2017 ]
Less work. [ Rafael  Mar 01, 2017 ]
What I was looking for [ Jeff  Mar 01, 2017 ]
to install system [ Luis  Feb 27, 2017 ]
Essential for existing functions in the car ,for example steering wheel controls [ David  Feb 24, 2017 ]
Included [ Steven J. van  Feb 13, 2017 ]
Included as part of the necessary kit with the unit I purchased. [ Justin Van  Feb 12, 2017 ]
To be prepared [ Alan  Feb 12, 2017 ]
To avoid the hassle of cutting into my factory harness. [ MICHAEL B.  Feb 07, 2017 ]
want to be able to easily put the factory radio back in if needed. [ Thomas  Feb 04, 2017 ]
Stereo installation made easy. [ R  Jan 30, 2017 ]
I forgot and it was suggested. These are great products I have used these harness' for years. Never been disappointed. [ Martin  Jan 30, 2017 ]
Ease aftermarket stereo install [ MATTHEW  Jan 29, 2017 ]
Recommended by advisor [ S. Rose  Jan 29, 2017 ]
needed for instalation [ Antonio  Jan 27, 2017 ]
To update my factory stereo [ Jesus  Jan 21, 2017 ]
This makes install easier. [ Greg  Jan 19, 2017 ]
Purchased to simplify a head unit install [ Whitney  Jan 10, 2017 ]
easy install, and did not want to reuse old stereo connector. [ Eggo  Jan 07, 2017 ]
I have had experience with these items and also without, and it just make the installation a whole lot easier with them. All you need to do is connect the color coded wires and then plug the connectors and you are done. SIMPLE [ Mario  Dec 30, 2016 ]
Quality with years of trouble free operation! [ THEODORE  Dec 29, 2016 ]
help with receiver install [ JASON  Dec 27, 2016 ]
needed [ Tanner  Dec 26, 2016 ]
needed. 'fits' - we'll see. gonna try it. [ William  Dec 19, 2016 ]
included with purchase to make my life easier [ JOSEPH S  Dec 18, 2016 ]
Its Free! [ S  Dec 13, 2016 ]
needed [ Paul  Dec 07, 2016 ]
Needed it [ Mark  Dec 05, 2016 ]
This is a must have for any new HD (head unit) This make connecting the aftermarket stereo to the vehicle a sinch. Just connect the same colors together and go. Or at least in my case it was matching the colors. [ Lafayette  Nov 30, 2016 ]
It is a good product and the correct item [ Patrick  Nov 29, 2016 ]
it was free [ Mary  Nov 28, 2016 ]
I have had this brand harness before. No complaints about the overall quality at this time. [ Stacey  Nov 27, 2016 ]
The customer service rep was very helpful and knew all the accessories i needed for my vehicle [ Chad E.  Nov 24, 2016 ]
Recommended install kit for stereo purchases at same time. [ Martin  Nov 19, 2016 ]
Comes with the purchase. [ Kerry  Nov 01, 2016 ]
Also needed this to install to existing factory wiring. [ Phonevilay  Oct 31, 2016 ]
I chose this because otherwise it would be very difficult to cut all the wires on the vehicles wiring harness and connect it to the aftermarket head unit. [ jackie  Oct 27, 2016 ]
From previous purchases I know that when Crutchfield suggest something, it is something that you will need for an easy installation. [ Chad  Oct 23, 2016 ]
These harnesses fit perfectly in my 2007 Xterra, and the new Kenwood stereo sounds great. [ Joseph  Oct 23, 2016 ]
Required for install [ Charlie  Oct 23, 2016 ]
Needed the ability to connect to existing harness. [ Thomas  Oct 23, 2016 ]
Needed it... [ Troy  Oct 22, 2016 ]
It was suggested harness by the site. [ TODD  Oct 20, 2016 ]
Fit Advisor said would fit mu vehicle. Moving Pioneer AVH-X3700BHS previously purchased from Crutchfield. [ JASON  Oct 15, 2016 ]
From previous experiences ordering from Crutchfield, these wiring harness simply the installation process. [ Mark  Oct 15, 2016 ]
To eliminate cutting into vehicles harness [ Martha O.  Oct 12, 2016 ]
Maintain the integrity of the oem wiring [ Robert  Oct 11, 2016 ]
Makes it easier to wire stereo [ Aurelio  Oct 11, 2016 ]
It was one of Crutchfield's free installation accessories with purchase of stereo. [ Charles  Oct 06, 2016 ]
Makes speaker installation easy. Thanks Crutchfield! [ MARK A  Sep 30, 2016 ]
Easier to install with proper equipment [ BRENDAN  Sep 27, 2016 ]
Free [ Christopher  Sep 27, 2016 ]
Needed for install [ Douglas  Sep 27, 2016 ]
crutchfield recommended [ THOMAS  Sep 25, 2016 ]
showed as essentilas [ Vinay  Sep 20, 2016 ]
The hardness is necessary to attach the reciever [ DONNIE  Sep 17, 2016 ]
I felt complete confidence that they would fit into my truck. [ Jose  Sep 05, 2016 ]
Recommended [ Ronald  Sep 04, 2016 ]
Recommended [ Cheryl  Aug 30, 2016 ]
I want Auxilary radio options in my newer car and I already owned the stereo from a previous car. [ Jared  Aug 22, 2016 ]
Wanted a simple, trouble free installation. [ John  Aug 16, 2016 ]
It was recommended for the connection between my stereo and my specific car. [ Nathan  Aug 15, 2016 ]
It was recommended for the product I purchased [ Nichoelle  Aug 10, 2016 ]
It's a great deal considering the free installation kit and instructions, plus free shipping! [ Nathan  Aug 10, 2016 ]
My last one broke [ Beverly  Aug 07, 2016 ]
It matches my vehicle! [ Carlos Ivan  Aug 03, 2016 ]
Need it! [ PHILLIP R  Aug 02, 2016 ]
They are needed for the installation [ Duain  Aug 02, 2016 ]
No cutting or splicing stock equipment basic plug and play [ Matthew  Aug 01, 2016 ]
Good quality [ Matthew  Jul 19, 2016 ]
I hope to use the Bluetooth feature on the Sony CD receiver to connect my I-phone's google maps feature. The back-up feature is a bonus for parking and for connecting to my boat trailers. [ Michael  Jul 18, 2016 ]
Ease of installation [ Jason  Jul 12, 2016 ]
The model that i needed for my 2002 Nissan Altima [ Levon  Jul 11, 2016 ]
makes it easy to connect the radio to the car [ Deric  Jul 02, 2016 ]
Need it [ Ron  Jul 01, 2016 ]
Needed for installation [ Michael  Jun 30, 2016 ]
I chose this harness as not to cut the factory wiring. That way if I should need to upgrade to a different radio in the future, all I need to do is unplug the harness. [ Greg  Jun 30, 2016 ]
Included as part of free installation package [ George  Jun 25, 2016 ]
Crutch field is very helpful online shopping website, I incourage other shoppers to call crutch field agents to verify the difference between two similar products. Could save you even more money. [ Dayro  Jun 23, 2016 ]
Because it was free and REQUIRED to install the head unit I purchased. [ Marcos  Jun 18, 2016 ]
This will allow a neat installation without cutting manufacturer oem cables. [ Walter  Jun 16, 2016 ]
Ease of install [ daniel  Jun 12, 2016 ]
Recommended for my install [ Stephen  Jun 11, 2016 ]
This product helped the installation process go seamlessly. [ JAMES  Jun 08, 2016 ]
I prefer not cutting factory wiring [ Eric C.  Jun 04, 2016 ]
Needed for install on my vehicle. [ Patrick  Jun 04, 2016 ]
past purchases went well and the ease of getting all the parts for a correct installation. [ DIANE  May 28, 2016 ]
So I wouldn't cut original wires [ RICARDO S  May 25, 2016 ]
It was needed for the car model I'm driving. [ Chas  May 22, 2016 ]
always go with wire harness suggested by Crutchfield, makes my installs simple!!!! [ E  May 22, 2016 ]
Answered previously [ Gary  May 22, 2016 ]
This makes installation easier by not having to wire in the dash. [ Richard  May 19, 2016 ]
Great price. [ Freddie c.  May 15, 2016 ]
This is my time trying them but they had good reviews. [ Roger  May 08, 2016 ]
From experience needed for ease of installation and to customize to car's wiring system [ GERALD  May 06, 2016 ]
T0 adapt my new Sony receiver to my vehicle,s factory cables. [ Thomas  May 06, 2016 ]
Don't have to cut the vehicle harness [ Duc Minh  May 04, 2016 ]
Needed to install the new radio [ andre  May 03, 2016 ]
Needed to attach to wiring harness [ David  Apr 29, 2016 ]
Can retain factory radio connections if you decide to reinstall the original unit back in if you are selling or salvaging vehicle [ AK47  Apr 26, 2016 ]
For a better install [ Joseph  Apr 26, 2016 ]
it was free and was required for the install without having to cut factory wiring [ Jonathan  Apr 24, 2016 ]
quick and easy hook ups! [ TAYLOR  Apr 19, 2016 ]
I chose this because I believe this should hook up to my stock radio in my 2005 Nissan Titan and hopefully it hooks up to my Pioneer double din deck. If not I'll have to individually connect each wire. [ Christopher  Apr 19, 2016 ]
to connect my stereo [ Martin  Apr 12, 2016 ]
this makes the installation very straightforward and easy [ Xavier  Apr 06, 2016 ]
You folks have great products for my truck, and you are my go-to place [ charles  Apr 06, 2016 ]
Because your staff suggested for an easier, safer and clean installation. [ Jose  Apr 06, 2016 ]
I picked these items because the Crutchfield team matched them with my receiver and I trust them completely. [ Ronnie  Apr 02, 2016 ]
ease [ bobby  Mar 31, 2016 ]
necessary parts [ FRANK  Mar 31, 2016 ]
it was suggested By Garrett of Crutchfield as a necessary accessory. Garrett's Bio: [ CARLOS  Mar 30, 2016 ]
Plug and Play. Basically. No more searching for which wire goes where. And it came with the unit, free. Cant beat that. [ Robb  Mar 18, 2016 ]
This is a must so you do not have hack up your factory wiring. Then if you decide to sell the car you can simply unplug your after market head unit, and plug the old factory one back in. I'm so glad crutchfield includes this at no charge. [ JEFFREY  Mar 02, 2016 ]
Easy hook up [ STEVE  Feb 24, 2016 ]
I needed it for correct installation. [ Scott  Feb 23, 2016 ]
So I could hook the radio up to my car without having to rig it up to work. [ Latousha  Feb 23, 2016 ]
easy wiring to the factory harness. [ David  Feb 14, 2016 ]
So that factory wiring would not have to be cut. [ Beverly  Feb 10, 2016 ]
Free!!! Saved $ [ Marcel  Feb 06, 2016 ]
I needed it for the install [ William  Jan 29, 2016 ]
Now I wont have to run around town looking for the exact items I need for installation. Instead, crutchfield gets me everything I need for installation for FREE, saving me a lot of money! [ Elijah  Jan 16, 2016 ]
To replace stock stereo without splicing wiring [ Thomas  Jan 09, 2016 ]
came with radio purchase [ Salvador  Jan 08, 2016 ]
Worked great to quickly connect my new receiver to the existing wire harness on my 2005 Nissan Frontier without cutting the existing wire harness. [ ROBERT  Dec 29, 2015 ]
For any level of experience installing a head unit, the factory wiring harnesses make it a simple matter of matching like color wire to like color wire. You can complete all of the wiring while sitting a a table or bench. You can use any type of connector for the connections, although I'd recommend soldering these connections for the cleanest, most reliable connection. Unless you are having to modify the vehicle dash opening, installation with a harness should take less than 30 minutes. [ Patrick  Dec 20, 2015 ]
Great quality, color matched wires to the factory harness most times. [ Jason  Dec 19, 2015 ]
Using a wiring harness to install your car receiver is the ONLY way to go. The Metra 70-7550 is the exact fit for my receiver and vehicle. It makes installation a snap! [ Richard W.  Dec 13, 2015 ]
Recommended by Crutchfield. [ Wylie A.  Dec 10, 2015 ]
Crutchfield recommended this wiring harness [ Mike  Dec 10, 2015 ]
Essential for proper wiring [ Joe  Dec 08, 2015 ]
Recommended accessory kit for the selected Head Unit and Vehicle. [ Matthew W.  Dec 05, 2015 ]
makes installation much easier, and it was free [ William  Dec 05, 2015 ]
you recommended [ Hector  Dec 04, 2015 ]

5 questions already asked

Thanks for your question. It depends on your vehicle options. If you do not have the Bose system, then yes that is the correct harness. If you do have the Bose system then you would need this one: Hope that helps. [ Kenny  May 02, 2016 ]  Staff
For additional details on fit or 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 if this will fit and what you will need for an installation in your vehicle. [ Kenny  Feb 17, 2016 ]  Staff
For details on fit or 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 if this will fit and what you will need for an installation in your vehicle. [ Kenny  Jan 13, 2016 ]  Staff
For details on fit or 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 if this will fit and what you will need for an installation in your vehicle. [ Krissy  Jan 13, 2016 ]  Staff
At age 79 going 80 in July, my answer may be a little late for you. I used 16 of the 22-18 GA, But Splice Connectors and just 1 16-14 GA. I crimped the connectors and wrapped each with colored electrical tape and bundled the lot with electrical tape and twine. I know soldering is better than crimping but my hands are not steady anymore. Hawaii air is very corrosive so a good tape job is necessary. The sound coming out from my car speakers are just outstanding so I know my connections are for now ok. Good luck! [ CHESTER  May 13, 2014 ]
I am not sure what the gauge is ,because I soldered my connection. [ DAVID K  Apr 30, 2014 ]
I think that it was around 16 / 18 gauge I had what I needed on hand so I am not sure, but I think you can get by with some thing that will work on 16 gauge. KI4MGM 73 William [ WILLIAM  Apr 29, 2014 ]
I actually haven't installed it in the truck yet, so I was able to look at the harness and it appears to be 18 gauge wire. I checked with connectors I have and red butt connectors fit correctly. Hope this helps. [ RAY  Apr 29, 2014 ]
I want to say they are 16-18 ga. Im leaning more towards 18 ga. But I can't say for certain. You should be able to get away with using 16 ga connectors with no issues. I'd recommend the heatshrink type. [ GARRETT J  Apr 28, 2014 ]
16 gauge [ AMBER N  Apr 28, 2014 ]

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