Metra 71-004C Speaker Wiring Harnesses

For select 1978-up vehicles — adapts new speakers to factory speaker connectors

Item #: 12071004

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Metra 71-004C Speaker Wiring Harnesses

These harnesses allow you to plug your new speakers into the factory connectors present in your vehicle's speaker openings. Please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if these adapters are compatible with your vehicle. Warranty: 60 days.

Note: Some aftermarket speakers have terminals that are wider than this harness's slide-on connectors. You may need to widen the harness's female slide-on connectors, or use the slide terminals that may be included with the speakers. If you need to connect your new speaker's connectors to the Crutchfield harness, soldering is best, and crimping is also very popular - see "Accessories."

Note: Most vehicles will require additional installation parts — please identify your vehicle if you haven’t done so, then check here for a list of parts. You can also call an Advisor for more information.

Hands-on research

What's in the box?

Download owner's manual

  • 2 Speaker harnesses
  • Instructions

Product Research

Features

Crutchfield Speaker Harness: Crutchfield speaker harnesses prevent having to cut your vehicle's factory speaker wiring when replacing the factory speakers with aftermarket car speakers. Each Crutchfield speaker harness features two female quick-slide connectors on one end that attach directly to your new aftermarket car speakers, and a proprietary connector on the other end that connects to your vehicle's factory speaker plug.

Quick-Slide Connectors: The Crutchfield speaker harness is equipped with large (positive) and small (negative) female quick-slide terminals. These quick-slide terminals fit directly onto most aftermarket car stereo speaker terminals (slight crimping may be required). In the rare cases that the quick-slide terminals do not fit your new speaker terminals, you will need to replace the quick-slide connectors on the Crutchfield speaker harness with the correct size terminal or solder the Crutchfield speaker harness to your aftermarket speaker's terminals.

Note: Installation tools, hardware, and accessories are not included and sold separately. Please see the Accessories tab for recommendations and availability.

Quick-Slide Terminal Measurements: The positive female quick-slide terminal measures 0.205" (inner width), while the negative female quick-slide terminal measures 0.110" (inner width).

Wire Code Chart: Two identical Crutchfield speaker harnesses are included.

Wire Color Function
White Positive
Black Negative

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 open the box, verify contents, 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.

Metra 71-004C Speaker Wiring Harnesses Reviews

Average Customer Review:

32 reviews
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Metra 71-004C Speaker Wiring Harnesses

Written By Anonymous, Wilmington, NC on Saturday, June 14, 2014

Crutchfield Customer Review (What's this?)

These things are great. They save you a lot of time since you don't have to cut and splice you wiring harness.

Pros: Saves time, no need for tools and the ends are already crimped for different terminals to prevent accidentally reversing the polarity.

Cons: There is no dielectric compound on them to prevent corrosion. But you can get that at almost any parts store.

Simple Install

Written By Tim R, APO Misawa Japan on Friday, May 09, 2014

Crutchfield Customer Review (What's this?)

This materials are awesome! It made the installation easy and quick.

Pros: Plug and play!

Cons: None

Awesome material

Written By Ace, Cerritos on Sunday, April 27, 2014

Crutchfield Customer Review (What's this?)

This materials are awesome! It made the installation easy and quick.

Pros: Plug and play! Easy to use and installed

Cons: None

Great harness

Written By Bob g, Pittsburgh, PA on Wednesday, April 09, 2014

Crutchfield Customer Review (What's this?)

The harnesses fit my car perfect and made installation a breeze!

Speaker Wiring Harnesses

Written By 13maddog, evergreen state on Thursday, April 03, 2014

Crutchfield Customer Review (What's this?)

this is the only way to wire speakers using your factory wire harness. it is so simple to do plus there's no running new wiring.

Pros: ease of use! plug and play!

Cons: none!

Obvious choice!

Written By crazyninja, Nashville, TN on Monday, March 24, 2014

Crutchfield Customer Review (What's this?)

Awesome not to have to cut and splice wires. These make installation a breeze!

Pros: Awesome!

Cons: None

Easy Install

Written By Sam, San Antonio, TX on Saturday, January 04, 2014

Crutchfield Customer Review (What's this?)

The wiring harness made the install on my replacement speakers a breeze, no guesswork, easy instructions, fit perfectly.

Pros: Easy Install, Factory fit, no guesswork.

Cons: None

Metra 71-004C Speaker Wiring Harnesses

Written By Anonymous, South Mills, NC on Wednesday, December 18, 2013

Crutchfield Customer Review (What's this?)

Easy install couldn't expect better

Metra 72-9301

Written By Joe C, Fresno Ca on Sunday, November 10, 2013

Crutchfield Customer Review (What's this?)

No brainer, Worked!

Pros: Easy

Cons: None

Used in 2002 Mini Cooper

Written By MrDrew, Phoenix, AZ on Friday, September 06, 2013

Crutchfield Customer Review (What's this?)

Purchased these to install new speakers into the front of my cooper. Installation was a breeze, attached terminal to speaker, attach plastic connector to factory connector and done. They fit perfect and give a good, solid connection.

Pros: Easy to install, solid connection

Cons: Can be difficult to install onto speaker terminals, due to a very snug fit; use caution when installing so you don't damage the speaker.

Metra 71-004C Speaker Wiring Harnesses

Written By Anonymous, Independence, KY on Tuesday, September 03, 2013

Crutchfield Customer Review (What's this?)

I would have been much happier if the wiring harness had had the bass-blocking capacitors that came with the speakers I purchased already connected.

Good harness

Written By Will, Tuxedo, NC on Thursday, June 13, 2013

Crutchfield Customer Review (What's this?)

Good harness easy to use

Dosesn't Fit '08 Prius with Nav

Written By Ali984, Los Angeles, CA on Thursday, June 06, 2013

Crutchfield Customer Review (What's this?)

I feel its a little unfair to rate the quality of these since I was unable to use them. I have 2008 Toyota Prius with the navigation system and JBL speakers. I was replacing the front door speakers as I felt the bass was too low and this adapter didn't fit or work in my system.

Pros: The idea of it is good, simple plug and good

Cons: Didn't fit my car or its system.

Super easy installing product

Written By WAC, Honolulu, HI on Thursday, May 30, 2013

Crutchfield Customer Review (What's this?)

These adapters made installing speakers into the stock wiring a breeze

Pros: Simple connection process

98' Sonata, fits perfectly

Written By PuttsMoBilesiCit, New Lenox, IL on Wednesday, March 27, 2013

Crutchfield Customer Review (What's this?)

I was surprised when I got these connectors and they fit flawlessly in my 1998 Hyundai Sonata.

Pros: - Fit perfectly - Free with speaker purchase

Not a fit for '97-'02 Forester

Written By Matthew W, Austin, TX on Monday, January 21, 2013

Crutchfield Customer Review (What's this?)

The harness "sort of" fits, but it is not a great match. I wish I'd read the reviews beforehand and seen what other reviewers did to make it fit better.

Pros: As long as it doesn't fall off, does its job.

Cons: Pretty sure it's going to fall off.

wasn't the correct connector

Written By Anonymous, st petersburg florida on Monday, January 07, 2013

Crutchfield Customer Review (What's this?)

did not fit existing factory harness. - clamp was not proper fit. I was able to plug them together and left it that way. if speaker quits i'll know why.

Montero speaker harnesses.

Written By Wayne, 97116 on Thursday, December 13, 2012

Crutchfield Customer Review (What's this?)

These work great as they should

Wires

Written By Elsteo17, 33063 on Monday, October 08, 2012

Crutchfield Customer Review (What's this?)

Worked perfect with my factory wires

Pros: Perfect fit

Cons: None

Metra 71-004C Speaker Wiring Harnesses

Written By Chuck, NC on Friday, February 17, 2012

Crutchfield Customer Review (What's this?)

Did not fit the stock connector installed in the vehicle. Had to cut and solder wires.

Metra 71-004C Speaker Wiring Harnesses

Written By Roy J, Union City, CA on Friday, October 28, 2011

Crutchfield Customer Review (What's this?)

Gets the job done. You will probably have to snip off the spade connector ends when using these adapters with component speaker sets.

Metra 71-004C Speaker Wiring Harnesses

Written By dd, Culpeper on Wednesday, April 20, 2011

Crutchfield Customer Review (What's this?)

Quick and easy connections made wiring the speakers very easy

Hyundai Sonata 2004

Written By BrianT, AZ on Sunday, February 13, 2011

Crutchfield Customer Review (What's this?)

These worked OK for the rear speakers of my Hyundai Sonata 2004. The connectors
were not a "perfect fit" but I used electrical tape to make sure they do not
easily pull apart.

98 Eclipse install

Written By Masonite, Puyallup, WA on Monday, July 26, 2010

I have a 1998 Mistubishi Eclipse that needed new door speakers. These wires made installing the speakers easy. All that I had to do was remove the door panel, unscrew the original speakers, plug in these wires, and screw in the new speakers. These wires made it so simple because I didn't have to splice the wires. The speakers I had came with connectors, but I never had to use them. Complete installation took me 10 minutes to swap out the speakers. Without these adapters, I would have had to splice the wires and take more time for installation. These were simple and saved me time. Thanks Crutchfield!!

Metra 71-004C Speaker Wiring Harnesses

Written By MrKFC, Chicago Suburbs, IL on Monday, July 12, 2010

Crutchfield Customer Review (What's this?)

I was happy to see that these adapters were included with my speaker purchase. It seemed that it would simplify the installation. It did not. The spade connectors were too small for the speaker connectors. I had to cut off the spade connectors and solder on the ones that came with the speakers.

Speaker Harnesses

Written By Sam, Philadelphia, Pa on Monday, May 04, 2009

These speaker harnesses were the very thing you need for a great fit with absolutely no hassle. Great Job CrutchField!
Sam

Great Speaker Harness

Written By David, Washington on Saturday, January 31, 2009

Crutchfield Customer Review (What's this?)

Made installing new speakers into my 1985 celica simple. No need for splicing wires. Just plug-n-play!

Fit right in

Written By John, Parsippany, NJ on Friday, November 21, 2008

Crutchfield Customer Review (What's this?)

These made for a very clean install for the rear speakers. Fit right in with the car harness and speakers.

Good idea, good product

Written By Chris, Wise, Va on Tuesday, November 04, 2008

Crutchfield Customer Review (What's this?)

I have a '98 Tiburon and received these with a pair of door speakers I purchased at no extra charge. Though they weren't an exact match for the original plugs they worked just fine and were a very welcome addition to my speaker purchase. It made the install quicker and easier and I didn't feel the need to break out my soldering gun "just to make sure". They got the job done with no muss, no fuss.

Metra 71-004C Speaker Wiring Harnesses

Written By B-Spec, Nevada on Saturday, October 18, 2008

These will fit a Suzuki SX4 but you have to bend or remove the factory clips out of the way. They made the install much easier..

exact fit for my SX4

Written By Ralph, Pittsburgh, Pa. on Friday, October 17, 2008

Crutchfield Customer Review (What's this?)

Fit perectly into my new speakers and the existing wiring aiding in an clean/easy installation.

Works Great in 97 Avenger

Written By Mark, Lincoln, NE on Tuesday, September 30, 2008

Crutchfield Customer Review (What's this?)

These adapters fit the stock connectors as expected, but they were a little tight. Not necessarily a bad thing as it should keep connections secure, but it was hard to tell when they were fully mated with the stock connectors.

Get everything you’ll need to enjoy your new Metra 71-004C Speaker Wiring Harnesses

If you don't already have these in your toolbox, you may find them handy, if not indispensable.
Some speakers have non-standard connectors. Make your installation easier with connector adapters.
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