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Metra 70-5006 Receiver Wiring Harness

Connect a new car stereo in select 1987-93 Ford and Mercury vehicles

Item # 120705006

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

Read more from Crutchfield writer, Jim R.

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About the Metra 70-5006 Receiver Wiring Harness

Metra 70-5006 Receiver Wiring Harness

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

Metra 70-5006 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.


Note: Two speaker harnesses are included — one is used if you have a factory amplifier, one is used if you don't. If there is no ground wire in the factory harness, you'll need to make a ground connection between your new receiver and your car's metal chassis.

  • 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 +/-

What's in the box:

  • 7.5" Power harness
  • 7" Non-amplified speaker harness
  • 7" Amplified speaker harness

Customer reviews

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Metra 70-5006 Receiver Wiring Harness Reviews

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Crutchfield response

More details on the Metra 70-5006 Receiver Wiring 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 Harness)

Wire Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Black Chassis Ground
Blue Power Antenna
Blue/White Amp Turn-On
Orange Illumination
Orange/White Dimmer
Orange/Black Not Used (tape off)

(Speaker Harness)      

Wire Color Function
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 -

Two Types of Speaker Harnesses: There are two different speaker harnesses included. Once is to be used for factory-amplified systems & the other for non-amplified systems. Each harness has the same number of wires, but a different connector plug.

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

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Customer Q&A

Crutchfield asked: Why did you buy this?
Free [ Kristopher  Dec 05, 2018 ]
To help with installation of my jvc head unit. [ ANTONIO  Jul 05, 2018 ]
Ease of installation [ Charles  Jun 10, 2018 ]
seemed to be the logical choice [ benoit  Apr 25, 2018 ]
Only wiring harness I could find that allows you to bypass factory amp, such a saving grace. [ Timothy  Mar 08, 2018 ]
to ease the installation process [ Jeanie  Dec 11, 2017 ]
This wiring harness SHOULD allow me to bypass the factory amplifier. 1988 Ford Mustang GT [ Sean  Nov 26, 2017 ]
its plug and play, and its free [ David  Oct 09, 2017 ]
The one I have is cracked from age [ Jerry  Feb 17, 2017 ]
To allow the interface between the receiver unit and OEM wiring harness [ William  Feb 08, 2017 ]
Nice to have an extra if the one on the old install doesn't make it out alive, also free. [ Jacob  Jan 02, 2017 ]
free [ andrew  Sep 02, 2016 ]
Cause its for a 1990 mustang lx [ Joshua  Jul 12, 2016 ]
It is needed for installation, and the price was right. [ Patrick  Jan 13, 2016 ]
Well you are the only source that carries this wiring harness in stock for my application would also like if you can guide me with correct front component speakers and matching series rear component speakers for stock locations. [ H  Dec 10, 2015 ]

1 question already asked

My factory speaker wiring harness only has 5 wires and the harness to install the new stereo. The new deck I'm installing keeps saying "misfiring" when I plug in the speaker connector. When only the power connecter is plugged in it seems to be working but of course no sound. Please advise...?
[ Gregg  Apr 25, 2015 ]
1 answer
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. You can also post your question in our forums: Or try our online support center:
[ Krissy  Apr 26, 2015 ]  Staff

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