Metra 70-7901 Receiver Wiring Harness Connect a new car stereo in select 1989-2003 Ford and Mazda vehicles

Name: Metra 70-7901 Receiver Wiring Harness
Brand: Metra
SKU: 120707901
Price: 12.99 USD
Availability: InStock
Rating: 4.5 (124 reviews)

Item # 120707901

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

Does it Fit your car?

Find what Fits your vehicle

Remove

Checking fit...

Front

1/3

Connect the Metra harness to your factory plugs

2/3

Only at Crutchfield

3/3

Only at Crutchfield. No pressure. And no commissions! Our experts help you get what you need and will never upsell you. No sweat. We do the research, so you get the best info, the best instruction, and the best tech support. All for free. No regret. With 60-day price protection and returns, you can feel good about your purchase – or send it back. Legendary Service. Since 1974.

Metra 70-7901 Receiver Wiring Harness Front

Metra 70-7901 Receiver Wiring Harness Connect the Metra harness to your factory plugs

Metra 70-7901 Receiver Wiring Harness Only at Crutchfield

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

Item # 120707901

Free 1-day shipping to Virginia on orders $50+

Every order includes

Free lifetime tech support
60-day price-drop protection
60-day returns

In stock

$12.99

Add to cart

Add to wishlist

Get questions answered fast & free

Expert help 400+ hours training Virginia-based

1-888-955-6000

Metra 70-7901 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.

Connections:

Note: You'll need to make a ground connection between your new receiver and your car's metal chassis.

12V constant power
12V switched power
power antenna turn-on
factory amp turn-on
dimmer
left front speaker +/-
right front speaker +/-
left rear speaker +/-
right rear speaker +/-

What's in the box:

Metra 70-7901 Receiver Wiring Harness owner's manual

7" Power/front-speaker harness
6.5" Rear speaker harness

Other info:

MFR # 70-7901
Item # 120707901
California customers: Please click here for your Proposition 65 WARNING.

Researched by Crutchfield's Stacey B.

Product Research

Features

Metra Wiring Harness: Metra 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 Metra 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 Metra 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 Metra 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
Blue	Power Antenna
Blue/White	Amp Turn-On
Orange	Illuimination
Empty	(none)
White	Left Front Speaker +
White/Black	Left Front Speaker -
Gray	Right Front Speaker +
Gray/Black	Right Front Speaker -

(Rear Speaker Harness)

Wire Color	Function
Green	Left Rear Speaker +
Green/Black	Left Rear Speaker -
Violet	Right Rear Speaker +
Violet/Black	Right Rear Speaker -

No Ground Wire: This harness does not contain a ground wire. You will need to ground your aftermarket head unit directly to the vehicle's metal chassis.

Loading accessories...

3 questions already asked

What wire needs to be used to power up the headrest speaker controls?

scott Mar 08, 2022

2 answers

I found that information by searching "Miata Z-74 Audio System wiring" on google and than click on images.

richard Mar 08, 2022

Copy and past the below text into notepad than resize the window until the lines align. 1 . M I A T A 2 H E A D R E S T S P E A K E R 3 P A R A L L E L AND S E R I E S 4 W I R I N G 5 6 =============================================================== 7 P A R A L L E L W I R E D 8 H E A D R E S T S P E A K E R S 9 10 PASSENGER SEAT SPEAKERS DRIVER SEAT SPEAKERS 11 (+)R(-) (+)L(-) (+)R(-) (+)L(-) 12 o o o o o o o o 13 | | | | | | | | 14 | | | | | | | | 15 | | | | | | | | 16 | | | | | | | | 17 | |_ | | | | _| | 18 | | | |_____________________|___|_____|_ | 19 | | |_________________________|___|_ | | | 20 | | | | | | | | 21 | _|_______________________________| | | | | | 22 | | | _______________________________| | | | | 23 | | | | | | | | 24 \ / \ / \ / \ / 25 ___o_____o_____________________________________o_____o___ 26 | (+) R (-) (+) L (-) | 27 | | 28 | Head Unit | 29 | Headrest Speaker Outputs | 30 |_________________________________________________________| 31 32 33 =============================================================== 34 S E R I E S W I R E D 35 H E A D R E S T S P E A K E R S 36 37 PASSENGER SEAT SPEAKERS DRIVER SEAT SPEAKERS 38 (+)R(-) (+)L(-) (+)R(-) (+)L(-) 39 o o o o o o o o 40 | | | | | | | | 41 | | | | | | | | 42 | | | | | | | | 43 | | | | | | | | 44 | | | | | | | | 45 | | | |_____________________|___|___ | | 46 | | |_________________________|___|_ | | | 47 | | | | | | | | 48 | | _____________________________| | | | | | 49 | | | _______________________________| | | | | 50 | \ / | | \ / | 51 \ x / \ x / 52 ___o_____o_____________________________________o_____o___ 53 | (+) R (-) (+) L (-) | 54 | | 55 | Head Unit | 56 | Headrest Speaker Outputs | 58 61 LEGEND: 62 L = Left 63 R = Right 64 o = Connection Point 65 (+) = Positive Terminal 66 (-) = Negative Terminal 67 x = Wire Splice (suggested point for ease of installation and,

richard Mar 08, 2022

What gauge are the wires?

jason Jun 09, 2019

1 answer

They do not list the gauge of the wire used. It is more than enough for the application in a vehicle's electrical system. I'f I had to take a guess, I'd say between 16 and 20 gauge.

thomas Jun 20, 2019 (Staff)

What is the relay in the easy connection for on a 2003 Ford escort?

dennis Apr 28, 2017

1 answer

For specific wiring/installation questions, you would be better served contacting an Advisor directly by phone (1-800-324-9695) or online chat. They can offer more detailed information to help better answer your questions.

david May 02, 2017 (Staff)

Loading articles...

Compare the sound

SpeakerCompare^™

Patented Virtual Audio^™ technology

Brand

Model

Please turn active noise cancelling off for best results

Don't see your headphones?
Rent our Listening Kit

SpeakerCompare^™ is protected by patents and patent applications owned by Crutchfield Corporation.

SpeakerCompare^™

Patented Virtual Audio^™ technology

Audition speakers before you buy

SpeakerCompare simulates the sound of home and car speakers through your headphones. It lets you compare sonic characteristics between speakers so that you can make a more informed shopping decision.

To get started: For the best sound comparison, we recommend selecting your brand and model of headphones in the right-hand column, or if your headphones aren't listed, you can rent one of our Listening Kits.

SpeakerCompare^™ is protected by patents and patent applications owned by Crutchfield Corporation.

Start here

SpeakerCompare^™

Please turn active noise cancelling off for best results

EQUAL
POWER

EQUAL
VOLUME

What to listen for

Track notes

Artist:

We're here to help

For free personalized advice, call 1-888-291-8923. Our Advisors have listened to most of the speakers we carry, and can help you make the best choice for your system.

We'd love to know what you think

Audition speakers before you buy

SpeakerCompare simulates the sound of home and car speakers through your headphones. It lets you compare sonic characteristics between speakers so that you can make a more informed shopping decision.

Why selecting your headphones is important

SpeakerCompare tailors your listening experience to the exact headphones you have, so that what you hear is comparable to auditioning speakers side-by-side in person. Knowing which model headphones you’re using lets us remove any sonic coloring from your experience.

Two different listening modes

In an actual listening room, you'd find that some speakers play louder than others when fed the same amount of power. In equal power mode, you'll hear these differences in loudness as they naturally occur between speakers.

In equal volume mode, we've made the loudness of each speaker about the same. This gives you a more direct comparison of subtle voicing differences between speakers.

Nothing beats listening to speakers in your space

SpeakerCompare gives you a sense of the sonic differences. But performance in the real world is affected by the acoustics of your car or home, your choice of amplification, and your source material. We still believe that the gold standard for auditioning speakers is hearing them in your own environment — that’s why we offer a 60-day money-back guarantee.

Our Listening Kit

To help you choose the right speakers, we recommend using Crutchfield’s SpeakerCompare Listening Kit. It includes a pair of studio-quality headphones, and a guide to getting the most out of your session, and a few other necessary items. We’ve carefully chosen the components of this kit to ensure a crystal-clear listening experience. It’s available for a nominal rental fee, and includes a $25 Crutchfield merchandise credit.

Request a kit

Expert help from our Advisors

Our hours

Shop smart & save time when you connect with an advisor

Our hours

Shop smart & save time when you connect with an advisor

Thank you. You are in line to receive a call from .

It's your turn. will be calling you shortly at .

Metra 70-7901 Receiver Wiring Harness Connect a new car stereo in select 1989-2003 Ford and Mazda vehicles

Does it Fit your car?

Find what Fits your vehicle

Get questions answered fast & free

Find what Fits your vehicle

Installation notes:

Additional items are required:

About the Metra 70-7901 Receiver Wiring Harness

Metra 70-7901 Receiver Wiring Harness

What's in the box:

Other info:

Featured review

More details on the Metra 70-7901 Receiver Wiring Harness

Product Research

Features

Customer Q&A

3 questions already asked

SpeakerCompare^™

Patented Virtual Audio^™ technology

SpeakerCompare^™

Patented Virtual Audio^™ technology

Audition speakers before you buy

SpeakerCompare^™

What to listen for

Track notes

Now playing

YOUR STUFF

GET IN TOUCH

YOUR PRIVACY

OUR COMPANY

STAY IN THE KNOW

Your Advisor

Expert help from our Advisors

Our hours

Shop smart & save time when you connect with an advisor

Our hours

Shop smart & save time when you connect with an advisor

Thank you. You are in line to receive a call from .

It's your turn. will be calling you shortly at .

Metra 70-7901 Receiver Wiring Harness Connect a new car stereo in select 1989-2003 Ford and Mazda vehicles

Does it Fit your car?

Find what Fits your vehicle

Get questions answered fast & free

About the Metra 70-7901 Receiver Wiring Harness

What's in the box:

Other info:

Featured review

More details on the Metra 70-7901 Receiver Wiring Harness

Product Research

Features

Customer Q&A

3 questions already asked

Related searches

Your Advisor