Metra 70-7551 Receiver Wiring Harness

Connect a new car stereo in select 1995-up Nissan and Infiniti vehicles

Item #: 120707551

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73 Reviews

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Metra 70-7551 Receiver Wiring Harness

Installation Note: This harness uses your factory amplifier; your new stereo must have two pairs of preamp outputs to connect this 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.

Metra 70-7551 Receiver Wiring Harness Reviews

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Great buy!

Written By Sean, North Carolina on Thursday, November 19, 2015

Crutchfield Customer Review (What's this?)

I bought this to install my double DIN unit into my 2011 Xterra with the Rockford Fosgate system. Plugged up great and works very well! Didn't have to cut any existing wires - which allows you to retain all of the stock plugs/wires for a quick re-install of the stock unit!

Pros: Works well

Cons: Directions confused me a little bit

Works great

Written By Darrell, Florida on Monday, September 28, 2015

Crutchfield Customer Review (What's this?)

Made my install easy

Works well

Written By nicktown, Maryland on Friday, August 07, 2015

Crutchfield Customer Review (What's this?)

No complaints. Harness fit perfectly with the HU i purchased and my truck.

Pros: fit perfectly, wired up easily with the instructions that came with my purchases.

Cons: None

works well

Written By dleg763, Florence, AL on Wednesday, July 01, 2015

Crutchfield Customer Review (What's this?)

Good harness

Pros: Easy to install.

Cons: Needs to be used with deck with 4volt preouts or won't be as loud as it should.

Simplifies install

Written By speed, Missouri on Monday, April 20, 2015

Crutchfield Customer Review (What's this?)

Used on 2005 Nissan Titan Rockford system and it simplifies the install. Several factory connectors were not used, but everything seems to work.

Pros: Simplifies install

Made Wiring A Breeze

Written By Andrew, Virginia on Thursday, April 09, 2015

Crutchfield Customer Review (What's this?)

This harness made the wiring a breeze and saved me a ton of time from having to cut and splice RCA cables as I have had to do for previous radio installs. Highly recommend!

Pros: Straight forward to install. Great and clear instructions.

Cons: None.

easy plug and play

Written By Anonymous, Oklahoma city,ok on Sunday, February 22, 2015

Crutchfield Customer Review (What's this?)

Easy to use

Works, but there is a better solution

Written By Will, Bay Area, CA on Thursday, February 05, 2015

Crutchfield Customer Review (What's this?)

Works as advertised with a JVC KD-AR959BS head unit in a 2001 Infiniti QX4 (Nissan Pathfinder LE) with factory Bose amps and speakers. The JVC has 4.8 volt preamp outs and the factory stereo had 4V outs so this harness provides acceptable volume and clarity. Unfortunately switching inputs with this harness causes the speakers to pop, which is annoying. I swapped this out with a Scosche CNN03 which works perfectly with no popping but required a little more wiring work.

Pros: Good sound quality with 4.8V preamp outs.

Cons: Popping from speakers when switching inputs

Metra 70-7551 Receiver Wiring Harness

Written By MattN, North Carolina on Wednesday, February 04, 2015

Crutchfield Customer Review (What's this?)

Great and simple to install harness. Wires are colored and labeled and has prewired RCA style connectors for an aftermarket radio to use the factory amplifier. Great product and was included free with my radio purchase from Crutchfield!

Pros: Simple and easy to use labeling and coloring.

Cons: None

Terrible - commonly causes amp pop

Written By AaronH, Duvall, Wa. on Tuesday, December 30, 2014

A Crutchfield sales person sold me this wiring harness to integrate a new JVC receiver that he sold me. Both were my son's Christmas present and were going into his 2006 Xterra w/ factory fosgate amp and sub. After carefully installing the new receiver using the wiring harness we were left with an incredibly loud and annoying pop every time we change radio stations, sources, or powers down the car. It's really bad. My son and I spent an entire day trying to diagnose and fix the issue. Crutchfield sent me a couple of PAC SN1 ground loop isolators which are supposed to help. These things are a bandaid that masks underlying problems but we'll see if they work.

If you do a search for Metra 70-7551 ground loop you'll see tons and tons of posts where people had the exact same issue. Crutchfield needs to stop recommending this harness and figure out something else.

I've installed a lot of stereos in my day and I've never had as much difficulty as this install. What a pain!? Crutchfield, you really let me down this time.

Crutchfield response on Monday, January 19, 2015 Thanks for bringing this issue to our attention. Integrating an aftermarket stereo with an upgraded factory system can be tricky and sometimes requires a little extra work to iron out the kinks. Most of the time, this harness works fine, but due to this ground loop issue, we are currently searching for a better solution.

Good fit up, poor instructions

Written By pboswell, Huntsville, AL on Wednesday, December 03, 2014

Crutchfield Customer Review (What's this?)

All connections fit up well, however this was the poorest set of instructions of any installation kit I've received fro Crutchfield. Had a total of eight Tech Support calls for this installation due to there being no instructions on what to do with extra ground wires, the necessity to slice in a chassis ground for my Nissan, and even which of the four colored RCA plugs corresponded to which speakers (LF, LR, RF, RR )

Pros: good easy connections

Cons: poor wiring instructions specific to my vehicle

Awesome transition

Written By Daniel, Midlothian, Va on Tuesday, November 18, 2014

Crutchfield Customer Review (What's this?)

i had previously purchased the Pioneer FH-X700BT and the harness to put into my 97 nissan pick up truck. i sold that truck and purchased an 03 nissan xterra with the rockford fosgate system. i found that i needed this new harness to properly install radio into my new vehicle. was very simple to install, i use a solder/ hook fastening to attach my radio pigtails to vehicle adapter pigtail.


Written By stand, north carolina on Sunday, November 16, 2014

Crutchfield Customer Review (What's this?)


Did the trick

Written By Anonymous, Pinehurst, NC on Monday, November 10, 2014

Crutchfield Customer Review (What's this?)

Just what I needed for install in my 2004 350Z. I did need to contact a Crutchfield tech to help me with wiring. Harness had basic instruction, which differed from what I needed to make head unit work with my car. Tech walked me through the process, and I was all set.

nice craftmanship

Written By Valas, McDonald, PA on Sunday, November 02, 2014

Crutchfield Customer Review (What's this?)

worked great

great product

Written By Mike E, Astoria NY on Sunday, September 14, 2014

Crutchfield Customer Review (What's this?)

I been using these plugs in all my cars for years and years.. The best way not to ruin your wire harness, super easy instructions.. You cant go wrong doing it yourself!

Pros: Everything!

Cons: None at all!

Metra in 06 frontier

Written By Anonymous, Pope Army Af, NC on Friday, August 29, 2014

Crutchfield Customer Review (What's this?)

Harness does not work well with the nissan frontier equipped with Rockford Fosgate sound system. Had to disregard the RCA connections and run speaker wire straight to the amplifier connector.

Pros: None

Cons: Not ideal for 06 frontier with RF system!

wiring harness

Written By titan up, windsor mo. on Wednesday, August 27, 2014

Crutchfield Customer Review (What's this?)

This harness works great. You just have to find the 2 connectors on the truck to match.

Couldn't be easier

Written By snotbottom, Milton-Freewater, OR on Saturday, March 08, 2014

Crutchfield Customer Review (What's this?)

Made installation a snap. I made all the connections to the wiring harness on the bench, then just plugged it into the car.

Pros: Works the first time

Easy to use

Written By SeanG, SW Florida on Wednesday, March 05, 2014

Crutchfield Customer Review (What's this?)

Easy to understand and use, made my install go easy with no issues at all.

Pros: Exact fit, no splicing

Cons: None

Works as it should

Written By BMace, Albany, NY on Monday, March 03, 2014

Crutchfield Customer Review (What's this?)

Used to replace Bose stereo in Maxima. Worked exactly like it was needed to. No issues.

Pros: Easy to use! Thanks Crutchfield

Cons: nothing

Done the job

Written By DAMOS, big pine key,fl on Sunday, February 09, 2014

Crutchfield Customer Review (What's this?)

This is somewhat simple. It got a little confusing when it came to the speakers. I bought this product before and discarded because of the speakers and extra wires I had. I thought I ordered the wrong one so I ordered it again. This time doing more research I.discovered the speakers are not wires yet Aux cords. So door speakers and all Aux. It seems as if the sound of the speakers lowered and I'm curious is because of the the using Aux instead of wires.

Pros: Works and helps

Cons: Confusing must do research. Guide doesn't help. Seems speakers are lower

Metra 70-7551 Receiver Wiring Harness

Written By Anonymous, Quitaque Texas on Sunday, February 02, 2014

Crutchfield Customer Review (What's this?)

Everything we have gotten from crutchfield has been just perfect! We ordered a wrong part to install my new radio but one email and they sent us what we needed fast! I've been telling everyone to use them!

Stereo installation made easy

Written By Anonymous, Mississippi on Friday, January 10, 2014

Crutchfield Customer Review (What's this?)

This thing made installation a snap!!!


Written By AtoB, Boston on Thursday, January 09, 2014

Crutchfield Customer Review (What's this?)

Works great


Written By Dave C, Atlanta, GA on Thursday, November 21, 2013

Crutchfield Customer Review (What's this?)

Perfect. Does it exactly what it should, makes installation a breeze.

Wire harness

Written By jerry, Midlothian, IL on Monday, November 11, 2013

Crutchfield Customer Review (What's this?)

This harness made the rewiring very easy. Bought the package of plastic wire nuts so I didn't even had to pull out the soldering iron. I wasn't sure about one wire I had to connect but a quick call to tech support and I had the answer right away. Very good tech support. The only reason I didn't give it 5 stars is that the harness I received had a bad connection to my right speakers so I called them and they sent out a new harness right away and that took care of the problem. They said I didn't have to send the bad harness back which was really great customer service.

Pros: made for an easy install. Great technical support.

Cons: Too bad the first harness I received was bad.

Works like a charm

Written By Anonymous, Williamsport, PA on Saturday, October 26, 2013

Crutchfield Customer Review (What's this?)

Harness fit perfectly, I have the factory Bose system in my 04 armada and needed this harness to keep the factory amp running. Very much plug and play only a few wires needed stripped for the power ground and such.

Had a question about what wire to use for the amp turn on, called Crutchfield and boom! Problem solved in minutes, very helpful to have tech support when you need it!

Pros: Plug and play harness

Cons: Nada

Works like a charm!

Written By RaulO, North Plainfield, NJ on Friday, October 04, 2013

Crutchfield Customer Review (What's this?)

Does exactly what it is intended to do! Very easy to install and fits the connectors perfectly!

Pros: Easy to use and works great!

Cons: None.

plug and play

Written By Ray43, NYC on Wednesday, August 28, 2013

Crutchfield Customer Review (What's this?)

3 words "plug and play" nothing more to add :)

Pros: easy

Cons: none

Like It

Written By jnsanders, Fort Walton Beach, Fl on Saturday, July 13, 2013

Crutchfield Customer Review (What's this?)

Used to connect Pioneer AVH-X5500BHS to 2006 Nissan Xterra (Rockford Fosgate system). Does its job. Harness itself and wires are high quality, well insulated.

Pros: Quality

Cons: n/a

Adapter saves factory wiring.

Written By Tom S., Lynden, WA on Monday, July 08, 2013

Crutchfield Customer Review (What's this?)

The harness does allow you to avoid cutting into the vehicle factory wiring, but still requires soldering or splicing between radio wiring and adapter.

Pros: Avoids cutting or splicing vehicle wiring.

Cons: Requires soldering or crimp splicing. A bit difficult to determine which wires are necessary as this is a somewhat "universal fit radio" approach and there are 3 different diagrams to follow: The one with ghe radio, the one packed with the adapter and the MasterSheet from Crutchfield.

Wire Harness adaptor

Written By TonyB, Tampa, Florida on Sunday, June 02, 2013

Crutchfield Customer Review (What's this?)

Easy fit to OEM connections makes it an easy install

Pros: Easy install

Cons: could use better instructions as to which wires should and shouldn't be connected

Nice wire harness

Written By Ryan F., Puyallup, WA on Monday, May 20, 2013

Crutchfield Customer Review (What's this?)

Basic wire harness. It does what its supposed to do.

Pros: fits nicely

Cons: none.


Written By Michael, Picayune on Sunday, May 19, 2013

Crutchfield Customer Review (What's this?)

I bought this harness for my 08 Titan with a Rockford fosgate system. I didn't really understand the hook up so I called crutchfield tech support and they sat there and walked me through the whole connect. Will recommend to anyone

2012 Nissan Frontier wiring harness

Written By Mr Klinket, Austin on Sunday, May 19, 2013

Crutchfield Customer Review (What's this?)

Easy to work with.

Pros: Wonderful instructions

Cons: None


Written By Anonymous, Carteret, NJ on Thursday, April 18, 2013

Crutchfield Customer Review (What's this?)

Work great

Metra 70-7551 Receiver Wiring Harness

Written By elvin v, mayaguez puerto rico on Tuesday, April 16, 2013

Crutchfield Customer Review (What's this?)

Work perfect

Nissan Maxima Bose interface cable

Written By Uncle Willie, Thomasville, GA on Wednesday, March 13, 2013

Crutchfield Customer Review (What's this?)

The adaptor utilizes the existing Bose amplifiers and speakers. The Bose panel unit is just a tuner/preamp, whereas the aftermarket radios do have a power amp which is not utilized in this installation. The instructions are good, and the installation is straightforward as long as the aftermarket unit has pre amp outputs.

Pros: Inexpensive, yet totally well engineered

Cons: Some confusion about the grounding of the harness.

Needs decoupling capacitors for OE Rockford Fosgate amp

Written By JColeman, Rougemont, NC on Thursday, January 24, 2013

Crutchfield Customer Review (What's this?)

The harness works great except on newer Nissan Xterras with OE Rockford Fosgate amps it creates loud amp pop when turning on and off due to how factory radio managed power to the amp. Had to wire four 0.1uF metalized film capacitors into the positive leads on the line-in wires and wire in a delay relay on the amp turn-on wire to eliminate the loud popping noise.

Pros: Quick and easy hook-up

Cons: OE amp timing and power issues

350z harness

Written By Anonymous, Philadelphia,PA on Thursday, January 10, 2013

Crutchfield Customer Review (What's this?)

made it easy to install the unit to my nissan 350z

Harness didn't work

Written By SOund_Guy, Chicago on Thursday, December 13, 2012

Installer advised that when hooked up to the BOSE Amp - the sound was very low. Installer ended up hardwiring the unit.

A breeze to install.

Written By LeeN, Dothan, Alabama on Monday, December 10, 2012

Crutchfield Customer Review (What's this?)

This wiring harness was simple to install, once I found a correct wiring diagram for my car. My only complaint would be that you have to cut and splice the speaker connections and there just isn't a whole lot of room to work. Other than that, this was probably the simplist install I have ever done. It just plugs right into the factory harness.

Pros: Uses factory harness.

Cons: Cut and splice on speaker wires.

It worked great

Written By Jeff, Upstate SC on Saturday, November 24, 2012

Crutchfield Customer Review (What's this?)

I had my doubts, particularly when I pulled out the original unit and saw that it had four connectors and the kit only had two. I even called tech support and they assured me it would work. And it did!

Pros: Worked great

Cons: Instructions don't allay your fears

Metra 70-7551 Receiver Wiring Harness

Written By rar, Denver, CO on Friday, October 05, 2012

Crutchfield Customer Review (What's this?)

Works great, and great instructions too.

perfect fit

Written By yardworker, Texas on Tuesday, August 14, 2012

Crutchfield Customer Review (What's this?)

works and fits but

Cons: factory radio has 4 plugs but harness only do two. so far everything works wihtout these two i can't use.

Convenient but incomplete

Written By Flycast47, Aledo, TX on Tuesday, July 17, 2012

Crutchfield Customer Review (What's this?)

Soldering up to the radio harness was simple and direct. As is the harness will not work with the combination of a JVC KW-R900BT and 2006 Xterra because of interference between the RCA connectors (for the AMP) and an air duct support bracket in the Xterra. 90 degree adapters are required and the you must carefully stuff the wires out way.

Pros: Greatly simplifies installation.

Cons: Interference required additional adapters

03 I35

Written By Curtis, Rhode Island on Tuesday, July 10, 2012

Crutchfield Customer Review (What's this?)

Works great

Cons: none

2003/2004 Infiniti G35 Wiring harness - Bose replacement

Written By RichL, Cary, N.C. on Saturday, July 07, 2012

Crutchfield Customer Review (What's this?)

Works fine. No problems.

Cons: None

on/off thump

Written By Tony, WY on Sunday, June 17, 2012

Crutchfield Customer Review (What's this?)

Installed this in an 02 Xterra with the Fosgate amp. The speaker thump when turning the key off was terrible. Crutchfield's amp turn on line filter, while probably a good idea, didn't change anything. In the end we ended up cutting the RCA ends off and wiring them to the stock speaker inputs on the amp. No more on/off thump now!

Metra 70-7551 Receiver Wiring Harness

Written By Anonymous, PALMDALE CA. on Tuesday, June 05, 2012


Does the trick

Written By Joe, WIlmington, NC on Saturday, June 02, 2012

Crutchfield Customer Review (What's this?)

For the most part this is fine and worked exactly as expected. It was installed between a Pioneer AVH-P2400BT and a 2012 Xterra with the Rockford Fosgate system.

The only thing it is missing is a connector for the steering wheel controls wires. I used an ASWC steering wheel adapter and the 3 wires that it tapped into enter a connector that plugs into the factory stereo but is not one of the ones that is pigtailed out with the included adapter harnesses. I had to break into the wires behind the connector to make the connections, as I was unable to find a pigtail connector for it. I used solder/heat-shrink to do it properly rather than using those horrible splices that cut through the insulation. It would be nice if this kit included a pigtail connector for this so that it wouldn't be necessary to cut into factory wires.

Pros: Included free with stereo purchase.

Cons: Needs one more connector.


Written By MikeW, Ogden, UT on Wednesday, March 28, 2012

Crutchfield Customer Review (What's this?)

Super easy to use and the instructions made it nearly impossible to make a mistake!

Not bad

Written By Stanton L., Sacramento, CA on Saturday, March 17, 2012

Crutchfield Customer Review (What's this?)

A pretty good kit overall. Instructions were clear and it included the RCA cables to reuse the factory amp. It does appear that I've lost the factory subwoofer though, but as far as integration with the other OEM speakers it was about as good as I expected. Would have been nice to keep the OEM sub and I may have to look into how to get that thing working as well. This was on a 2006 Nissan Frontier Crew Cab with the factory Rockford Fosgate stereo.

Pros: Good instructions. Connected without problems. Retained use of factory speakers and amps (except subwoofer)

Cons: Lost use of factory subwoofer

Metra 70-7551 Receiver Wiring Harness

Written By 350z, Hollywood, Fl on Wednesday, January 25, 2012

Crutchfield Customer Review (What's this?)

Worked great but I guess this unit was not set up for steering wheel control. Factory unit came with 4 plugs and this harness and unit only came with 2. I am not sure what else I lost on the 350z besides the steering wheel controls.

Metra 70-7551 Receiver Wiring Harness

Written By 05 G35 Coupe, McHenry, IL on Tuesday, January 17, 2012

Crutchfield Customer Review (What's this?)

Very easy installation, but i have to turn my stereo up all the way to get half the volume i had with the stock unit. In order for an aftermarket unit, the bose amp has to be bypassed and the speakers all have to be re-wired.

Works perfect for 2003 Infinity G35 sedan with Bose system

Written By Steve, Missouri on Saturday, October 15, 2011

Crutchfield Customer Review (What's this?)

Just completed a new system install in my 2003 Infinity G35 sedan with the Bose system. Replaced my head unit with a JVC KD-AHD79, Axxess ASWC and the bluetooth adapter JVC KS-BTA100. Adapters worked perfectly.

Easy Install

Written By Tom, sacramento, ca on Friday, September 16, 2011

Crutchfield Customer Review (What's this?)

This wire harness worked perfect with my new Kenwood Stereo replacement for my G35 coupe Bose. Super easy install. I just matched up the wires with the stereo harness and soldered the connects while comfortably seated at my workbench (you can use crimp connects). Then it was just a plugged into my radio and the car wire harness. Very clean and easy install; looks professional. I'm very pleased and the harness was free with the purchase of the stereo. Crutchfield is the best!

Perfect, easy!

Written By DougL, Atlanta, GA on Thursday, July 28, 2011

Crutchfield Customer Review (What's this?)

Simple install. Everything matched perfectly. Best part you can do it all inside your house in the A/ need to crawl around in the car to wire up the new radio. Make your connections inside, screw together the awesome mounting bracket from Crutchfield and then take it all out to the garage and reinstall 4 screws and you're done. Nothing could be easier, nor a better value!

Metra 70-7551 Receiver Wiring Harness

Written By Gary H, Richmond , Ky. on Sunday, July 24, 2011

Crutchfield Customer Review (What's this?)

Just perfect , connectors matched wiring instructions were easy to fallow . Installation looks like a pro did the job.


Written By Todd B, Oak Harbor, WA on Saturday, July 23, 2011

Crutchfield Customer Review (What's this?)

The wire harness worked in that it allowed the deck to play by simply plugging in the harness. However, once it was working, the volume level of the deck was minimal. After doing some research on 350Z forums, it turns out the factory Bose system runs through dual amps and pushes 1-2 ohms. By running the system through it using the provided wire kit, it was not good. I took my dash back apart, ran new speaker wires to the doors and rears, cut the cars wire harness and tapped into the power, illumination and memory wires. Those 3 are the only wires I used from the cars harness. Once I bypassed the Bose components, volume levels were great and sound was 1,000% better. Recommend re-thinking the adapter harnesses provided to bypass the Bose components.


Written By roughneck, Arkansas on Saturday, May 28, 2011

This worked great! I installed an aftermarket HU on a 2004 Xterra with the RF system. It was easy to install. I did notice that I didn't have to use some of the wires that I normally would. I didn't have to use the amp ground wire because the stock amp is grounded at another place. Also I didn't have to use the ground coming off the main harness either because there was no ground wire running into the stock harness. This saved me from having to splice together four ground wires. All I had to do was run a ground from the new HU.

Great harness for bypassing the stock stereo

Written By Kevin, Atlanta, GA on Monday, May 23, 2011

Crutchfield Customer Review (What's this?)

This harness fits my 2003 Nissan Sentra Spec-V with the AudioFanatic Rockford Fosgate stereo package. For those of you with this particular vehicle/audio package, you are probably aware that the stock head unit is awful. This harness comes in two pieces, one for the rear RCA speakers/sub, and one for the front speakers (in addition to the other wires they connect like the power, remote switch, etc.).

When I installed my stereo, I did somewhat of a hybrid install. I installed it in the lower DIN so that I could keep the original stereo in there for a cleaner look (effectively using it only as a clock). I ran new stereo wire to the front and rear speakers so I could drive them off the head unit (I didn't particularly trust the stock amplifier). I left the half of the factory harness that gives the head unit power connected to the factory stereo. The other half, I connected to this harness so that I could use my RCA out on my new head unit to feed a signal to the factory amplifier without splicing/soldering any wires.

It worked great. I'd recommend using this for the RF Audiofantic package.

Metra 70-7551 Receiver Wiring Harness

Written By KennyC, Covington, LA on Monday, April 11, 2011

Crutchfield Customer Review (What's this?)

Not much to say.....ordered it, came in two days, worked like a charm- perfect
fit, life saver! Thanks Guys!

Simple clean solution for keeping factory Blose system

Written By Jonathan C, Bloomington, IL on Monday, April 04, 2011

Crutchfield Customer Review (What's this?)

Great simple solution when adding an aftermarket HU to your factory system. One
thing to keep in mind, when wiring it tot he stereo's harness, make sure you
wire it blue to blue, and blue\white to blue\white. If you wire the amp turn on
to the antenna wire, it will play the Fm radio fine, but you wont hear anything
when playing CD or any aux inputs, because it will turn off the amp. Quick call
to Crutchfields Tech support (Thanks Pat or Paul, I believe his name was) and 5
minutes later, viola, music!

Fairly simple

Written By Leo H, Timberlake, NC on Wednesday, March 30, 2011

This harness adapter is ok but I was unsure about the blue wire for the power
antennae. Since mine is in the rear glass I didn't use it but found out I need
to connect it to the blue and white for the antennae booster. Also my car has
the factory navigation and it seems they could make one with provisions to
connect this also.

Metra 70-7551 Receiver Wiring Harness

Written By Anonymous, Chicago, IL on Sunday, March 06, 2011

Crutchfield Customer Review (What's this?)

No need to rewire for bose system, the best wire harness

it works

Written By jonny, winston salem, nc on Saturday, February 26, 2011

Crutchfield Customer Review (What's this?)

gets the job done.

It worked, despite my mistake

Written By Mark M., Rockwood, TN on Thursday, February 03, 2011

Crutchfield Customer Review (What's this?)

I tore up the connector on my car when it did not pull out easily (Don't use a screwdriver
to pry it out if this happens to you!). But a Crutchfield tech advisor stayed on the line with
me through two hours of fumbling and cussing as he talked me through step-by-step
hardwiring all those pesky wires. Great job. Wish I could remember his name.

Works perfect

Written By Nismo350, Central Florida, FL on Thursday, May 13, 2010

Crutchfield Customer Review (What's this?)

Has all the connections you will need to hook it up to your Bose system in a 350z/G35. Works great.

Metra 70-7551 Receiver Wiring Harness

Written By Ricardo, Maywood, NJ on Monday, May 18, 2009

Crutchfield Customer Review (What's this?)

Great connection!

Metra 70-7551 Receiver Wiring Harness

Written By tramayne, dallas on Thursday, September 18, 2008

Crutchfield Customer Review (What's this?)

great product. accomplishes goal, but BEWARE only use this setup with a premium sound if your aftermarket radio puts on 4 volts or more. if not go with the 7550.

Metra 70-7551 Receiver Wiring Harness

Written By Ron, Cary, NC on Wednesday, August 20, 2008

Crutchfield Customer Review (What's this?)

It does what it's supposed to do.

Hands-on research

What's in the box?

Download owner's manual

  • 7.5" Power/ground harness
  • 7.75" RCA 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/Front Speaker Harness)

Wire Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Black Chassis Ground
Blue Power Antenna
Orange Illumination
White RCA Left Front Channel
Gray RCA Right Front Channel

(Rear Speaker Harness)

Wire Color Function
Black/White Amplifier Ground
Blue/White Amp Turn-On
Green RCA Left Rear Channel
Violet RCA Right Rear Channel

Factory Amp Note: This harness includes RCA connections (instead of speaker wire leads) to connect the aftermarket head unit's preamp outputs to your vehicle's factory amp. Your aftermarket head unit must be equipped with front & rear preamp outputs.

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

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