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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

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61 Reviews | 1 question - 1 answer

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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 +/-

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 70-1677-1 Receiver Wiring Harness Reviews

Average Customer Review:

61 Reviews

Metra 70-1677-1 Receiver Wiring Harness

Written by: Russ from California on November 29, 2015

Crutchfield Customer Review (What's this?)

Plug and play. Plugged right into the 85 G.M. fact. harness.

Pros: 5-star.

Cons: none

Greatest service ever!!!!!!!!

Written by: caprice from maryland on November 18, 2015

1988 Chevrolet Caprice
Crutchfield Customer Review (What's this?)

Works great and was delivered less then 24 hours !!!!!!!!!!!!!

Pros: Works great and was delivered less then 24 hours !!!!!!!!!!!!

Cons: None

Perfect

Written by: GregM from Alaska on November 2, 2015

1983 Chevrolet C Series
Crutchfield Customer Review (What's this?)

This harness fits perfectly made the install a piece of cake

Pros: fits perfectly

Cons:

nice!

Written by: Eric from Illinois on October 4, 2015

makes connecting a snap

Pros: perfect for older cars

Cons: none

Easy Install

Written by: Michael from Knoxville, TN on June 9, 2015

Crutchfield Customer Review (What's this?)

Made installation of a new unit for an older vehicle easier.

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: Anonymous from San Bruno, ca on May 10, 2015

1990 Chevrolet S10
Crutchfield Customer Review (What's this?)

The easy to use installation guide that Crutchfield sent me made my life so much easier. When I had a problem with the install they answered right away and helped me finish my installation in my truck.

Pros:

Cons:

Wiring made easy.

Written by: Russell M from South Carolina on April 7, 2015

1984 Chevrolet Corvette
Crutchfield Customer Review (What's this?)

Detailed Installation Diagram made this and easy as plugging into a wall socket. I solder and shrink wrap my connections and it sounds AWESOME!

Pros: EASY PEZY!

Cons: None

Great kit.. Easy install..

Written by: Andy from Kings Mtn NC on February 15, 2015

1985 Chevrolet Blazer S10
Crutchfield Customer Review (What's this?)

Easy install..

Pros:

Cons:

Wiring harness

Written by: Wayne from Ottawa, KS on February 1, 2015

1986 GMC C Series
Crutchfield Customer Review (What's this?)

Very easy to do

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: Anonymous from Pickford, mi on January 10, 2015

Crutchfield Customer Review (What's this?)

Easy to use. simplifies installation

Pros:

Cons:

buyer

Written by: Anonymous from Gallatin,MO on October 29, 2014

1991 Chevrolet S10
Crutchfield Customer Review (What's this?)

good

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: Sooner Russ from Norman, Oklahoma on October 26, 2014

1990 Chevrolet Blazer
Crutchfield Customer Review (What's this?)

Quick shipping and everything worked easily. Will definitely use Crutchfield again.

Pros: Easy to use

Cons: None

Metra wiring harness the best

Written by: Jpaez from Alice Texas on October 21, 2014

1991 Chevrolet Suburban
Crutchfield Customer Review (What's this?)

The product makes life easy and the radio install quick, has color coded wires that tell you every thing ,pertty much plug n play

Pros: Every thing is good about it,perfect!!!

Cons: I really did not find any cons about it

Metra 70-1677-1 Receiver Wiring Harness

Written by: Anonymous from Palmer ak on October 18, 2014

1985 Oldsmobile Cutlass Calais
Crutchfield Customer Review (What's this?)

Shipped fast. Exactly what I needed.

Pros:

Cons:

Incorrect harness

Written by: Bubbie! from Walkersville, Md. on July 31, 2014

1986 Chevrolet Blazer S10
Crutchfield Customer Review (What's this?)

The harness came with the receiver, I ordered. However the harness did tie into the existing wiring. .

Pros: Uncertain

Cons: Uncertain

Receiving Wiring Harness

Written by: Charity from Augusta, GA on July 24, 2014

1992 Chevrolet Blazer S10
Crutchfield Customer Review (What's this?)

Good Product

Pros: Installed first radio in less than an hour, mostly due to the simplicity of the wire harness.

Cons: This is not a one piece plug like the original stock piece. Instead, these are 3 separate plugs. Lack of directions for the novice knowing to attach same color wires from harness to wires harness that attached to radio... since additional wires on both sides. That would've made it a little quicker.

Metra 70-1677-1 Receiver Wiring Harness

Written by: Nelson C. from Utuado PR on May 15, 2014

1992 Chevrolet Blazer S10
Crutchfield Customer Review (What's this?)

Just Great easy to install fits perfect.

Pros: Easy connect to the factory harness , you cant go wrong.

Cons: none

Not quite plug and play but close

Written by: Pappy from Point Pleasant, WV on March 9, 2014

1991 Chevrolet Blazer S10
Crutchfield Customer Review (What's this?)

This is a good product and makes wiring a snap. The only issue on my older Chevrolet Blazer is there is 2 different pigtails and the directions for the connection of the illumination wire is a little vague. One call to tech support and all is well.

Pros: Ease of use and quality product. Its free with the head unit!

Cons: Everything is good.

Metra 70-1677-1 Receiver Wiring Harness

Written by: Anonymous from Tyler, TX on February 12, 2014

1990 Chevrolet G Series
Crutchfield Customer Review (What's this?)

Saves time!

Pros:

Cons:

Wire Harness

Written by: Tim T from MANSON IA on February 10, 2014

Crutchfield Customer Review (What's this?)

Wire harness

Pros: Fit perfect

Cons:

Good Product.

Written by: Wheaties from Dundee, MI on January 15, 2014

Crutchfield Customer Review (What's this?)

Included with my Pioneer head unit but I would have gladly paid for it. Really helps with specific vehicles to make all the right connections. Can't do without it unless shade tree is how you operate.

Pros: It's all good.

Cons: None.

Makes it easy

Written by: Duke from Fredericksburg, PA on September 11, 2013

Crutchfield Customer Review (What's this?)

This harness made hookup very simple. Along with the detailed instructions and diagrams, the unit was up and running in no time.

Pros: Easy to understand and install.

Cons: None

Metra 70-1677-1 Receiver Wiring Harness

Written by: Anonymous from Sparks, NV on August 20, 2013

1985 Oldsmobile Cutlass Supreme Brougham
Crutchfield Customer Review (What's this?)

Easy to install

Pros:

Cons:

Works perfect

Written by: Anonymous from Arkansas on August 19, 2013

1985 Buick Grand National
Crutchfield Customer Review (What's this?)

Fit perfect to the factory harness

Pros:

Cons:

Good product

Written by: NickR from Asheville, NC on August 10, 2013

Crutchfield Customer Review (What's this?)

quality product and fit my application perfectly. However, instead of being a one peice plug like my 1988 Chev. S-10, it was three separate plugs.

Pros: proper fit and match for my application

Cons: This is not a one piece plug like the original stock piece. Instead, these are 3 separate plugs.

just right

Written by: joe from avondale,az on July 25, 2013

1992 Chevrolet Blazer S10
Crutchfield Customer Review (What's this?)

it fits perfect crutchfield has great products and so easy to order

Pros:

Cons:

Excellent Product!

Written by: Sal from PA on July 14, 2013

1990 Chevrolet Suburban
Crutchfield Customer Review (What's this?)

Thick gage wires, especially for power. Had zero issues soldering to my radio harness or connecting the old connections to it. Wiring diagram was accurate and clear aside from the "Power Antenna" wire which I didn't not use but my stereo works fine.

Pros:

Cons:

Great harness

Written by: Jason from Junction city ks on July 6, 2013

1990 GMC S15
Crutchfield Customer Review (What's this?)

The harness is great. I used it with my 1990 gmc s15 and it connected perfect. The s15 has a few different plugs so I was worried that I would get them mixed up. But there are grooves on this harness that won't let you plug in the wrong one on the wrong whole. It also comes with long enough wires to do any thing you would need. The color diagram was spot on and perfect when hooking it it up with the head unit.

Pros: Everything about it

Cons: Nothing at all

Top Notch

Written by: Rick from Albany, Ga on May 20, 2013

1986 Chevrolet Camaro
Crutchfield Customer Review (What's this?)

Very high quality. Nicely labeled and fit like a glove.

Pros: Heavy gauge wire, quality materials.

Cons: none

Metra 70-1677-1 Receiver Wiring Harness

Written by: Mphs from Memphis TN on April 23, 2013

Crutchfield Customer Review (What's this?)

Str8 no cutting

Pros:

Cons:

Receiver Wire Harness

Written by: Marco from Long Island, NY on April 18, 2013

1985 Oldsmobile Cutlass Supreme
Crutchfield Customer Review (What's this?)

Great conector

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: Anonymous from Louisville, KY on April 15, 2013

Crutchfield Customer Review (What's this?)

Great product

Pros:

Cons:

The only way to go!!

Written by: GeorgeD from Tipton, MI on March 28, 2013

Crutchfield Customer Review (What's this?)

This is the only way to go when replacing a factory radio with an aftermarket unit. NO HACKING OF THE CAR'S HARNESS REQUIRED.

Pros:

Cons:

Poor instructions

Written by: DonP from St. Charles, Mo. on March 8, 2013

Crutchfield Customer Review (What's this?)

The product itself is okay but the instructions for the harness are pretty much non existing. The speaker wires from this harness to the PAC converter is pretty much a color code match but the Antenna/Amp power wire connection was guess work. I had an additional wire that was not mentioned anywhere in any of the instructions. After 4 calls to the Tech support, I suggested this wire may be why I didn't have sound and he agreed. It was the reason. and now I have sound. Need a bit more detail on how to connect the blue/white antenna/amp tripper wire. It's labled Remote Control wire which leads you to believe its some kind of antenna for the remote control for the radio.

Pros: Seems well made.

Cons: Incomplete instructions for my application but your Tech Support is great.

Metra 70-1677-1 Receiver Wiring Harness

Written by: Anonymous from mcdonough, ga on February 21, 2013

Crutchfield Customer Review (What's this?)

right on!!

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: Kaz from Delano, CA on January 8, 2013

Crutchfield Customer Review (What's this?)

did not fit

Pros:

Cons: Wrong part. Had pro install plug, did not fit. Had to buy correct part to fit. It was free, but didn't fit, so what good was it?

Harness

Written by: DennisA from Napa, CA on December 22, 2012

1987 Chevrolet Monte Carlo
Crutchfield Customer Review (What's this?)

Plugged right into the factory harness.

Pros: Simple install

Cons: Didn't come with butt connectors

Harness

Written by: Anonymous from California on November 22, 2012

1983 Chevrolet C Series
Crutchfield Customer Review (What's this?)

Not worth the trouble

Pros: Only worked for two wires

Cons: Way to bulky

Receiver Wire Harness

Written by: Riley R. from Antigo, WI on November 13, 2012

1985 Buick LeSabre
Crutchfield Customer Review (What's this?)

Very nice, saved alot of time

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: Jerry from St. Charles, Il on November 12, 2012

1991 Chevrolet S10
Crutchfield Customer Review (What's this?)

Went together easily, no surprises.

Pros:

Cons:

Reciever Wiring Harness

Written by: Steve M from Las Vegas on August 29, 2012

1988 Chevrolet Suburban
Crutchfield Customer Review (What's this?)

This wiring harnesss made installation a breeze. There was only one wire that I had to wire sepeartely. I pre-wired the JVC head unit before starting the install. Once I got the radio chassis mounted in the dash, The radio was plug and play after that. Great product

Pros:

Cons:

Harness

Written by: TJ from Austin, Texas on August 9, 2012

1987 Chevrolet C Series
Crutchfield Customer Review (What's this?)

I love this product, too bad the factory connector had been removed prior to this install.

Pros: Great product for fast assembly.

Cons: If not factory radio more then likely the factory connector has been discarded.

Good Product

Written by: gwgdog66 from Oklahoma City OK on June 17, 2012

1985 Chevrolet El Camino
Crutchfield Customer Review (What's this?)

Works great and allows the use of existing factory wiring

Pros: Fits many aftermarket radio's

Cons:

lifesaving assistance

Written by: MikeG from Elwood, IN on June 15, 2012

1992 Oldsmobile Cutlass Ciera
Crutchfield Customer Review (What's this?)

The combination of instructions, drawings, parts, wires, and hardware is FABULOUS! It is so calming to know that you have everything that you need, so that you can just concentrate on figuring out how to use it.

Pros: Everything is the right size, it all fits together, the step-by-step directions are written by people who know what they're talking about, and it's truly a CUSTOM kit-not some generic "in-the-ballpark" junk.

Cons: none.

Reciever wire harness

Written by: mrdeeno2 from Nebraska on May 23, 2012

1986 Chevrolet S10
Crutchfield Customer Review (What's this?)

Everything worked and fitted great, this was a farley easy installation

Pros: good fit ,easy install

Cons: nothing I could see

Makes it easy

Written by: Nick J. from Pasco, WA on April 22, 2012

1989 Oldsmobile Cutlass Ciera
Crutchfield Customer Review (What's this?)

Well made. Makes installation a breeze. The only problem is that the plug size and tha amount of extra wire makes it a little difficult to fit behind stereo int he dash of 89 olds cutlass ciera. Other than that, saved a huge headache.

Pros: easy to use

Cons:

Awesome product

Written by: Derek from New Jersey on February 16, 2012

1988 Chevrolet Corvette
Crutchfield Customer Review (What's this?)

Worked perectly !

Pros:

Cons:

GM Wire Harness

Written by: SteveT from Madison Heights, VA on October 11, 2011

1981 Chevrolet El Camino
Crutchfield Customer Review (What's this?)

Honestly, I have not used this connector yet. The quality of the harness looks very good. I will use this harness when I install my new radio in my Chevy El Camino!

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: mike from phoenix, az on August 4, 2011

1986 Oldsmobile Cutlass Supreme Brougham
Crutchfield Customer Review (What's this?)

EASY set up for connections

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: RonG from Butte, MT on July 11, 2011

1984 Oldsmobile Toronado
Crutchfield Customer Review (What's this?)

Great harness! I would NOT install any equipment without it!

Pros:

Cons:

Easy, Quick Installation

Written by: Steve D from Fort Collins, CO on June 24, 2011

1989 Chevrolet Blazer S10
Crutchfield Customer Review (What's this?)

This wiring harness made installing the Pioneer Stereo into our S-10 Blazer fast, easy and error free. We had the new unit installed in less than an hour.

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: Willy from Madison, WI. on May 23, 2011

1988 Chevrolet Monte Carlo
Crutchfield Customer Review (What's this?)

Wow, does this make for a nice installation. I took extra pains and soldered and shrink tubed every connection. When done just plug it in and it works wonderfully. Instructions are very clear and the color coding is great. I've now used these kits on a GM and a Dodge, Crutchfield really scores a home run on these kits!

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: Anonymous from FL. on October 27, 2010

Crutchfield Customer Review (What's this?)

Wire harness, installation instructions and tech. support were great.

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: Tim from putnam, ny on July 18, 2010

1987 Chevrolet Camaro
Crutchfield Customer Review (What's this?)

Follow the instructions and your golden

Pros:

Cons:

Easy as 1, 2, 3

Written by: Stevie from Lomita, CA. on April 7, 2010

1987 Chevrolet El Camino
Crutchfield Customer Review (What's this?)

It was so easy since all the wires have colors that you just have to match together & after a couple of plugs that snap in I was all done.

Easy as 1, 2, 3

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: Jon from alabama on January 24, 2010

1987 Chevrolet Monte Carlo
Crutchfield Customer Review (What's this?)

works great fit just like a factory harness

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: Kevin from Massachusetts on February 6, 2009

1992 Chevrolet Blazer S10
Crutchfield Customer Review (What's this?)

Good product, hooks right up. Make sure you buy crimps or can solder well and have shrink tube! it DOES NOT come with it!

Pros:

Cons:

Metra 70-1677-1 Receiver Wiring Harness

Written by: rockburnrun from Elkridge, MD on February 2, 2009

1982 Chevrolet Corvette
Crutchfield Customer Review (What's this?)

Well made, soldered nicely, and fit perfectly.

Pros:

Cons:

Great

Written by: turbo442 from Vacaville, CA on January 28, 2009

1987 Oldsmobile Cutlass Supreme
Crutchfield Customer Review (What's this?)

Works perfect and very easy to use. Plugged right in with easy to follow directions

Pros:

Cons:

Quick

Written by: Robert from Haughton, Louisiana on December 3, 2008

1984 Chevrolet C Series
Crutchfield Customer Review (What's this?)

This product was great snapped right into the factory wireing.

Pros:

Cons:

Easy install

Written by: Aaron from Missouri on September 12, 2008

1984 Chevrolet C Series
Crutchfield Customer Review (What's this?)

This harness was a snap to attach to the radio wires. I soldered the ends together and then it was a simple attachment to the factory wires. Piece of cake install.

Pros:

Cons:

Hands-on research

What's in the box?

Download owner's manual

  • 8" Switched Power/Speaker wiring harness
  • 7.5" Constant/Illumination 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 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
Empty (none)
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

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.

Customer Q&A

Crutchfield asked  
Why did you buy this?

For easer hook up [ Bettie  Feb 02, 2016 ]
keep things simple and clean [ Richard  Jan 18, 2016 ]
good deal [ fred  Jan 10, 2016 ]
made life much easier.. [ Robert  Jan 05, 2016 ]
It had great reviews [ Steve  Dec 30, 2015 ]
Crutchfield has tech support [ ADAM  Dec 18, 2015 ]
It was recommended to make the install process better [ Mike  Dec 17, 2015 ]
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 ]
Necessary for a quick and easy installation. [ RUDOLPH  Dec 10, 2015 ]
It was suggested with the purchase [ JAMES  Dec 04, 2015 ]

1 question already asked

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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