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Metra 70-1677-1 Receiver Wiring Harness

Connect a new car stereo in select 1970-93 General Motors-built vehicles

Item # 120701677

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 # 120701677

In stock
C$10.99

About the Metra 70-1677-1 Receiver Wiring Harness

Metra 70-1677-1 wiring harness

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

Metra 70-1677-1 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 it 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.

Connections:

Note: The 12V constant power lead may not be present in your car. If not, and your receiver requires a constant 12V memory lead (most do), run a wire directly to the battery or an appropriate un-switched fuse.

  • 12V constant power
  • 12V switched power
  • chassis ground
  • power antenna turn-on
  • dimmer
  • left front speaker +/-
  • right front speaker +/-
  • left rear speaker +/-
  • right rear speaker +/-
READ LESS

What's in the box:

  • 8" Switched Power/Speaker wiring harness
  • 7.5" Constant/Illumination harness
MFR #70-1677-1

Customer reviews

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Metra 70-1677-1 Receiver Wiring Harness reviews

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More details on the Metra 70-1677-1 Receiver Wiring Harness

Stacey B.

Product Research

Wiring Harness: This wiring harness prevents 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 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 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 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 SWIC adapter is required & sold separately.

Wire Code Chart:

(Switched Power/Speaker Harness)

Wire Color Function
Red +12 Volt Accessory
Black Ground
Blue Power Antenna
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 -

(Constant Power/Illumination Harness)

Wire Color Function
Yellow +12 Volt Constant
Orange Illumination

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
Stereo, install kit, wire harness, and instructions. Great deal! [ John R.  Aug 20, 2019 ]
A
I actually didn't choose it. It was included with my stereo purchase [ Christopher All  Aug 11, 2019 ]
A
Fits my car and Crutchfield recommended it and it was FFFFREE [ Roy  Jul 23, 2019 ]
A
Why not [ Michael De  Jul 06, 2019 ]
A
Crutchfield suggested this adapter. They've never been wrong yet. [ Jason  May 24, 2019 ]
A
Came free with radio headunit. Needed for easy install. [ George  May 04, 2019 ]
A
fits my car [ john  Apr 10, 2019 ]
A
good harness for the job [ Kristie  Mar 09, 2019 ]
A
Honestly I am not a car stereo guy. As a mechanic I know how to install. But it's not a passion. I am finishing up work on my toy and needed a head unit over the years I have had kinwood. sony. Jvc . but my favorite go's back to my 99 SS camaro that had a Alpine in it and that's why I bought this Alpine [ Donald  Mar 07, 2019 ]
A
To connect radio [ Rodney  Feb 25, 2019 ]
A
With these I don't have to cut my original stock harness [ Cody  Feb 10, 2019 ]
A
ease of installation [ Shaun  Jan 29, 2019 ]
A
Good reviews [ Bruce  Jan 25, 2019 ]
A
Easier insulation [ Manny  Jan 17, 2019 ]
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I trust your choices [ Steve  Jan 13, 2019 ]
A
recommended by Crutchfield. I needed a wiring harness that could be used for this specific receiver. [ Allen  Dec 31, 2018 ]
A
included [ John  Dec 31, 2018 ]
A
easier installation [ Bob  Dec 27, 2018 ]
A
The Metra 10-1677-1 was selected to facilitate the removal and replacement of an O.E.M. radio with an aftermarket one, using the vehicle's original speaker wiring and connectivity design. [ John  Dec 26, 2018 ]
A
It was recommended [ Linda  Dec 20, 2018 ]
A
This item makes the hookup of the stereo much easier to the factory speakers. [ Roger  Dec 07, 2018 ]
A
I don't believe it gave me the option of declining this, the car I"m putting it in already has the factory connecter removed. Will try to return it when my order comes in [ Don  Nov 26, 2018 ]
A
to keep the original conection [ David  Nov 23, 2018 ]
A
I have used the Crutchfield installation kits and found these simplify the installation process the wires are clearly marked for simple hook up. [ David  Nov 20, 2018 ]
A
No need to cut and crimp wires, just connect and be done. [ Glenn  Nov 06, 2018 ]
A
I didn't want to cut into the factory wiring in my classic Cadillac Eldorado convertible and this made installation simple and reversible [ JEFFERY  Oct 25, 2018 ]
A
Free [ Keith  Oct 22, 2018 ]
A
Ease installation process. [ Lance  Sep 25, 2018 ]
A
may need it. plus it was free!! [ Russell  Sep 23, 2018 ]
A
Simply to simplify installation [ John  Sep 06, 2018 ]
A
The harness in my car isn't cut and it was a freebie with the purchase of the head unit. [ Russell  Aug 31, 2018 ]
A
It was free and I always end up needing a little more wire. [ BRYAN  Jul 24, 2018 ]
A
Easy install [ Odianosae  Jul 24, 2018 ]
A
Should work [ Kyle  Jul 14, 2018 ]
A
definitely the way to go when installing radios into your vehicle. allows for the factory plug ins to connect to this harness and then you can wire it to your new radio . gives you extra length of wires for easier veiwing while installing. [ Thomas  Jul 10, 2018 ]
A
Crutchfield is very user friendly and I'm very happy with there customer service and support! [ Robert  Jul 04, 2018 ]
A
it was free and i don't want to hack up my wiring harness [ Dennis  Jun 26, 2018 ]
A
free [ david  Jun 04, 2018 ]
A
it was free! [ Alan  Jun 03, 2018 ]
A
This was suggested by the Crutchfield Professional I was chatting with. [ Dan  May 25, 2018 ]
A
recommended [ ROBERT  May 24, 2018 ]
A
I needed it to connect it to my other car system [ Robbie  May 16, 2018 ]
A
Nice looking Receiver for a great price! Not to mention free installation kit! [ RICHARD A  May 13, 2018 ]
A
for easy installation [ CHRISTOPHER D  May 03, 2018 ]
A
Came with the radio [ Adam  Apr 24, 2018 ]
A
its the right one for my car [ THOMAS  Apr 11, 2018 ]
A
It makes it easier to install the receiver with no miswired connections. [ DJ  Apr 10, 2018 ]
A
everything hooks up and fits when you buy stereo's from crutchfield, making it faster and a lot less nerve racking [ Mark  Mar 29, 2018 ]
A
It is needed for the installation and was free with purchase. [ Edward  Mar 29, 2018 ]
A
Did some research, it's the correct harness for my truck and fits the head unit I bought. [ Armand  Mar 28, 2018 ]
A
Because they work [ Robert  Mar 24, 2018 ]
A
Makes hook up easier [ James  Mar 21, 2018 ]
A
Hoping its the correct harness for my application. I tried another brand i bought local and it did not work. [ JOsh  Mar 05, 2018 ]
A
It was free [ KEVIN  Mar 01, 2018 ]
A
Fit Vehicle [ JOHN  Mar 01, 2018 ]
A
More choices, free shipping and fast. Thank you. [ Constancio  Feb 20, 2018 ]
A
it was recommended to make installation easier and was extremely economical [ vincent  Feb 14, 2018 ]
A
to wire stereo [ William  Feb 12, 2018 ]
A
To make installation easier. [ Dale Nye  Jan 31, 2018 ]
A
it was free yo!! [ thomas  Jan 21, 2018 ]
A
good price and came with insall goods. [ Danny  Jan 19, 2018 ]
A
Was recommended [ LUIS F  Dec 18, 2017 ]
A
factory wiring connection. [ Thomas  Dec 15, 2017 ]
A
I chose the wiring harness to leave my factory harness intact when installing my new stereo, otherwise I would have had to cut into my harness. [ James  Dec 13, 2017 ]
A
Because it is what goes with the radio and that is what the website suggested I pick [ Ronna  Dec 12, 2017 ]
A
This Harness was automatically recommended to me based on the model vehicle and the receiver that I picked. [ Brad  Dec 01, 2017 ]
A
It is what was suggested. [ Trever  Nov 27, 2017 ]
A
required for aftermarket head unit in y 91 Silverado. [ Michael  Nov 24, 2017 ]
A
So much easier to install without having to splice original hardness [ ELEAZAR  Nov 21, 2017 ]
A
Free [ Mathew  Nov 15, 2017 ]
A
My daughter has an 87 Chevy truck and a stereo that I have to install. I did not want to cut up the original wiring to install it. [ Brian  Nov 06, 2017 ]
A
I had to choose your company again because I remember when I had ordered some items from your website back in 2015 that the shipping was free and extremely fast and that made me a very happy and proud customer. [ JAMES  Nov 02, 2017 ]
A
need it [ gary  Oct 16, 2017 ]
A
I don't want to cut my wires [ cleotha  Oct 13, 2017 ]
A
To make wiring easier. [ Richard  Sep 29, 2017 ]
A
Option for installing upgraded system in my k10. [ Jeff  Sep 21, 2017 ]
A
fit my needs, good reviews, price was right [ Robert  Aug 23, 2017 ]
A
Ease of install. [ Arthur  Aug 22, 2017 ]
A
I NEEDED A HARNESS AND NO LOCAL RETAILERS HAD IT FOR MY CLASSIC CAR. [ Russ  Aug 04, 2017 ]
A
It was free and I needed it. [ Trevor  Jul 18, 2017 ]
A
For easier install [ Kelly  Jul 14, 2017 ]
A
Thank You - Having these items listed makes shopping easier & faster by not having to check & be sure everything fits and helps make sure I don't get in the middle of my install and need something to complete the job. [ nichole renne  Jul 12, 2017 ]
A
for installation [ Thomas  Jul 09, 2017 ]
A
For correct install [ Raymond  Jul 07, 2017 ]
A
It's the only one that fits this model. [ Colin  Jul 05, 2017 ]
A
because I have a radio fro your company [ William  Jul 02, 2017 ]
A
Came with kit which was nice [ Angela  May 22, 2017 ]
A
Needed it for stereo [ KEVIN  May 15, 2017 ]
A
It was the only option to install my stereo. [ John  May 13, 2017 ]
A
to keep from having to cut my wiring harness [ kaw  May 08, 2017 ]
A
For easier installation & removal. [ Thomas G.  Apr 30, 2017 ]
A
It was needed [ Joe  Apr 19, 2017 ]
A
Clean connection [ WILLIAM  Apr 04, 2017 ]
A
Cuz I like the CD player [ Jereme  Mar 27, 2017 ]
A
The internet told me I needed it.I always believe the internet [ Chuck  Mar 12, 2017 ]
A
included free with purchase of radio, helpful component in making installation easier as well as ability to return vehicle to stock. [ Peter  Feb 27, 2017 ]
A
Rms 40 x4 and pre amp out 5v power!! Clarity is the ultimate goal with power!!! [ juan  Feb 22, 2017 ]
A
To properly install a new stereo into a 1978 Chevrolet Monte Carlo. [ Timothy  Feb 15, 2017 ]
A
Free with purchase [ Michael  Feb 12, 2017 ]
A
Fits my truck [ Wade  Feb 11, 2017 ]
A
It also was included for free. [ james  Jan 23, 2017 ]
A
I use this so I do not have to cut my vehicle wires,and much easier to wire up...make the job quicker with no hasseles [ mark  Jan 15, 2017 ]
A
The ease of connections with these harnesses just make the whole job of installing effortless and fun! ALWAYS get the harness!! You'll be glad you did! [ JEREMIAH  Jan 05, 2017 ]
A
Part of installation kit [ Pat  Jan 04, 2017 ]
A
Ease in installation and recommend by Crutchfield [ William  Dec 17, 2016 ]
A
makes wiring new receiver much easier. [ cara  Dec 11, 2016 ]
A
Required for installation [ Daniel  Dec 05, 2016 ]
A
Money saver& simple to install without cutting original harnesss. Worked great, now need speakers. [ Victor  Nov 11, 2016 ]
A
ease of installation [ Frank  Nov 11, 2016 ]
A
To install radio in my 84 Monte carlo [ Donald  Oct 29, 2016 ]
A
-It was recommended by you for a 1980 C10 [ DAVID  Oct 16, 2016 ]
A
Wanted to keep original radio in case i sell car [ james  Oct 10, 2016 ]
A
Got the needed parts to put this new radio in my older run around car. Have gotten kits for other vehicles before and makes the job easy. [ KEVIN  Sep 30, 2016 ]
A
ease of installment [ Gerrod  Sep 17, 2016 ]
A
Needed for install in a 30 year old Trans Am ....very simple color coding. [ Thomas  Sep 15, 2016 ]
A
required for proper installation [ Frank  Sep 07, 2016 ]
A
not sure if factory plug has been cut off, may not need. [ STEVE  Aug 27, 2016 ]
A
DIRECT CONNECTION AND IT WAS FREE [ PETER  Aug 17, 2016 ]
A
Required to install my new deck into my car. [ Stephen  Aug 12, 2016 ]
A
Site recommended, free and if correct, handy [ Terry  Aug 03, 2016 ]
A
1. It was free 2. Makes installation extremely easier. Able to wire up the head unit on my work bench, go to vehicle, plug and play. [ Michael  Jul 24, 2016 ]
A
easy connections with original gm dash wiring [ Paul  Jul 01, 2016 ]
A
for easy connection and to retain OEM wiring without hacking into it [ Jeffrey  Jun 30, 2016 ]
A
I used this on my 82 Corvette and it worked great. [ Daniel  Jun 27, 2016 ]
A
to keep the wiring simple [ Dorce  Jun 20, 2016 ]
A
This is what I believe works for my Stock 1986 Pontiac Firebird Trans Am. The Metra won't plug directly into the Kenwood. [ Gregory  Jun 04, 2016 ]
A
Makes install easy [ Frank  Jun 03, 2016 ]
A
Makes it easy to hook up [ TERRY  May 30, 2016 ]
A
Things are easier to hook up with the right harness. [ Michael G.  May 29, 2016 ]
A
make it easier [ Scott  May 16, 2016 ]
A
It was free with my order and makes easy hookup [ Barbara  Apr 29, 2016 ]
A
I don't like cutting any factory wires the wiring harness is always a must for my installations [ James  Apr 20, 2016 ]
A
Recommend it, always trust Crutchfield judgement and they have never steered me wrong!!!!! I love that there is no pressure and items always come complete with items needed for the install. [ MARGARET H  Apr 15, 2016 ]
A
it was recommended for my header [ Evan  Apr 05, 2016 ]
A
This item makes the wiring of the stereo to the truck a snap. [ Roger W.  Apr 04, 2016 ]
A
To make installing head unit easy and painless. [ Clint  Apr 03, 2016 ]
A
It is supposed to fit our vehicle!!! [ Jacqueline  Mar 30, 2016 ]
A
is made for my installation [ Theodore  Mar 24, 2016 ]
A
Installing in my 1985 Chevrolet C10 Silverado [ Chris  Mar 14, 2016 ]
A
Makes installation easier. [ Eric  Mar 12, 2016 ]
A
is the only harness that would work with my factory set wiring in my cutlass ciera ! [ Timothy  Mar 05, 2016 ]
A
Ease of installation [ Paul  Feb 29, 2016 ]
A
The wire plug had been cut off. I want to replace the pigtail and make it plug in . [ Vernon L.  Feb 25, 2016 ]
A
It was free [ NATHAN  Feb 22, 2016 ]
A
Fits my vehicle and makes a head unit install headache free. Metra is a leader in installation accessories and of course it's from Crutchfield! So I know it will fit due to their extensive vehicle research into what install accessories you'll need. Plus Crutchfield's tech support and customer service is the best available! [ FRANCIS E  Feb 19, 2016 ]
A
For easer hook up [ Bettie  Feb 02, 2016 ]
A
keep things simple and clean [ Richard  Jan 18, 2016 ]
A
good deal [ fred  Jan 10, 2016 ]
A
made life much easier.. [ Robert  Jan 05, 2016 ]
A
It had great reviews [ Steve  Dec 30, 2015 ]
A
Crutchfield has tech support [ ADAM  Dec 18, 2015 ]
A
It was recommended to make the install process better [ Mike  Dec 17, 2015 ]
A
It was recommended when I bought the stereo.... only made sense to get the right wiring harness for my vehicle...This is why I love buying from Crutchfield - it's almost impossible to order the wrong parts - because their website is automated to get you the parts you need without having to search all over for them. :) [ CHARLES  Dec 15, 2015 ]
A
Necessary for a quick and easy installation. [ RUDOLPH  Dec 10, 2015 ]
A
It was suggested with the purchase [ JAMES  Dec 04, 2015 ]
SHOW MORESHOW LESS

2 questions already asked

Q
where does the yellow battery wire connect to? I have a 1983 el camino
[ nic  Apr 26, 2017 ]
1 answer
A
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, or try our online support center: http://crutchfield.custhelp.com/app/answers/list/kw/.
[ Krissy  Apr 26, 2017 ]  Staff
Q
I have a 84 K5 Blazer and the previous owner hacked the factory radio connector from the harness. How can I replace this?
[ D  Feb 12, 2014 ]
1 answer
A
We do not carry the factory radio side of the connector. If you want the factory side of the plug you are probably going to need to check a junkyard (I doubt a dealer would have this). Our Tech team will also be able to help you connect the bare wire directly to the wires on a receiver. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help you figure out the best next step.
[ Jeff  Feb 13, 2014 ]  Staff

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