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Metra 70-5521 Wiring Harness

Install a new car stereo and retain factory amplifier in select 2003-2012 vehicles from Ford, Mercury, Lincoln

Metra
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• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

See compatible vehicles Learn more about the met-705521

Select a vehicle. Make sure it fits.

Was $29.99 Details
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$8.99

 with warranty

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We confirm fitment and offer accessories for speakers. Please set your vehicle first if you would like to purchase more than one met-705521.

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Get it Fri, Mar. 22 to VA. Order $49+ to ship free.
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Description


Metra brand icon

Authorized dealer

Product Features:

Connections:

  • Yellow – 12V Constant
  • Red – 12V Accessory
  • Black - Ground
  • Orange – Dash Light Dimmer/Illumination
  • Green – Left Rear Speaker (+)
  • Green with Black Stripe Left Rear Speaker (-)
  • White – Left Front Speaker (+)
  • White with Black Stripe – Left Front Speaker (-)
  • Purple – Right Rear Speaker (+)
  • Purple with Black Stripe – Right Rear Speaker (-)
  • Gray – Right Front Speaker (+)
  • Gray with Black Stripe – Right Front Speaker (-)

Compatible Vehicles


Please use our Fitment Guide to determine specific compatibility for the submodel and audio features

  • 2003 Ford Crown Victoria
  • 2003 Ford Expedition
  • 2003 Lincoln LS
  • 2003 Lincoln Navigator
  • 2003 Lincoln Town Car
  • 2003 Mercury Grand Marquis
  • 2003 Mercury Marauder
  • 2004 Ford Crown Victoria
  • 2004 Ford Escape
  • 2004 Ford Expedition
  • 2004 Ford Explorer
  • 2004 Ford F-150
  • 2004 Ford Mustang
  • 2004 Lincoln Aviator
  • 2004 Lincoln LS
  • 2004 Lincoln Navigator
  • 2004 Lincoln Town Car
  • 2004 Mercury Grand Marquis
  • 2004 Mercury Marauder
  • 2004 Mercury Monterey
  • 2004 Mercury Mountaineer
  • 2005 Ford Crown Victoria
  • 2005 Ford Escape
  • 2005 Ford Escape Hybrid
  • 2005 Ford Expedition
  • 2005 Ford Explorer
  • 2005 Ford F-150
  • 2005 Ford F-250 Super Duty
  • 2005 Ford F-350 Super Duty
  • 2005 Ford Five Hundred
  • 2005 Ford Focus ZX3
  • 2005 Ford Focus ZX4
  • 2005 Ford Focus ZX5
  • 2005 Ford Focus ZXW
  • 2005 Ford Freestyle
  • 2005 Ford Mustang
  • 2005 Lincoln Aviator
  • 2005 Lincoln LS
  • 2005 Lincoln Navigator
  • 2005 Lincoln Town Car
  • 2005 Mercury Grand Marquis
  • 2005 Mercury Mariner
  • 2005 Mercury Montego
  • 2005 Mercury Monterey
  • 2005 Mercury Mountaineer
  • 2006 Ford Crown Victoria
  • 2006 Ford Escape
  • 2006 Ford Escape Hybrid
  • 2006 Ford Expedition
  • 2006 Ford Explorer
  • 2006 Ford F-150
  • 2006 Ford F-250 Super Duty
  • 2006 Ford F-350 Super Duty
  • 2006 Ford Five Hundred
  • 2006 Ford Focus ZX3
  • 2006 Ford Focus ZX4
  • 2006 Ford Focus ZX5
  • 2006 Ford Focus ZXW
  • 2006 Ford Freestyle
  • 2006 Ford Fusion
  • 2006 Ford Mustang
  • 2006 Lincoln LS
  • 2006 Lincoln Mark LT
  • 2006 Lincoln Navigator
  • 2006 Lincoln Town Car
  • 2006 Mercury Grand Marquis
  • 2006 Mercury Mariner
  • 2006 Mercury Mariner Hybrid
  • 2006 Mercury Milan
  • 2006 Mercury Montego
  • 2006 Mercury Monterey
  • 2006 Mercury Mountaineer
  • 2007 Ford Crown Victoria
  • 2007 Ford Escape
  • 2007 Ford Escape Hybrid
  • 2007 Ford Explorer
  • 2007 Ford Explorer Sport Trac
  • 2007 Ford F-150
  • 2007 Ford F-250 Super Duty
  • 2007 Ford F-350 Super Duty
  • 2007 Ford Five Hundred
  • 2007 Ford Focus ZX3
  • 2007 Ford Focus ZX4
  • 2007 Ford Focus ZX5
  • 2007 Ford Focus ZXW
  • 2007 Ford Freestyle
  • 2007 Ford Fusion
  • 2007 Ford Mustang
  • 2007 Lincoln Mark LT
  • 2007 Lincoln Town Car
  • 2007 Mercury Grand Marquis
  • 2007 Mercury Mariner
  • 2007 Mercury Mariner Hybrid
  • 2007 Mercury Milan
  • 2007 Mercury Montego
  • 2007 Mercury Monterey
  • 2007 Mercury Mountaineer
  • 2008 Ford Crown Victoria
  • 2008 Ford Explorer
  • 2008 Ford Explorer Sport Trac
  • 2008 Ford F-150
  • 2008 Ford F-250 Super Duty
  • 2008 Ford F-350 Super Duty
  • 2008 Ford F-450 Super Duty
  • 2008 Ford Fusion
  • 2008 Ford Mustang
  • 2008 Ford Taurus
  • 2008 Ford Taurus X
  • 2008 Lincoln Mark LT
  • 2008 Lincoln Town Car
  • 2008 Mercury Grand Marquis
  • 2008 Mercury Milan
  • 2008 Mercury Mountaineer
  • 2008 Mercury Sable
  • 2009 Ford Crown Victoria
  • 2009 Ford Explorer
  • 2009 Ford Explorer Sport Trac
  • 2009 Ford F-250 Super Duty
  • 2009 Ford F-350 Super Duty
  • 2009 Ford F-450 Super Duty
  • 2009 Ford Fusion
  • 2009 Ford Taurus
  • 2009 Ford Taurus X
  • 2009 Lincoln Town Car
  • 2009 Mercury Grand Marquis
  • 2009 Mercury Mountaineer
  • 2009 Mercury Sable
  • 2010 Ford Crown Victoria
  • 2010 Ford Explorer
  • 2010 Ford Explorer Sport Trac
  • 2010 Ford F-250 Super Duty
  • 2010 Ford F-350 Super Duty
  • 2010 Ford F-450 Super Duty
  • 2010 Lincoln Town Car
  • 2010 Mercury Grand Marquis
  • 2010 Mercury Mountaineer
  • 2011 Ford Crown Victoria
  • 2011 Ford F-250 Super Duty
  • 2011 Ford F-350 Super Duty
  • 2011 Ford F-450 Super Duty
  • 2011 Ford F-550 Super Duty
  • 2011 Lincoln Town Car
  • 2012 Ford F-250 Super Duty
  • 2012 Ford F-350 Super Duty
  • 2012 Ford F-450 Super Duty
  • 2012 Ford F-550 Super Duty

Specifications & Details


Harness Features
Vehicle Sound System
Standard Sound
Main Harness Function
Install a Car Stereo & Bypass the Factory OEM Amplifier
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

70-5521

Weight:

0.23lbs

Internal SKU:

met-705521

Internal Product ID:

12664

Customer Ratings & Reviews



5 star
81%
4 star
6%
3 star
13%
2 star
0%
1 star
0%



Durability
4.6
Value
4.8
Features
4.5
Design
4.6
Usability
4.6

Customer Reviews

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It restored the deep bass to my SUV...

Metra harnesses are great quality harnesses. There is a reason that they are the first choice of a vast majority of pro installers. While I'm not a pro, I am quite proficient in the realm of audio installations and I too prefer metra products(although on occasion I have used scosche products as well). This harness includes, besides the interface from aftermarket head unit to the stock vehicle harness, the harness to put the stock sub and amp back into your system when installing an aftermarket head unit. If you already have an aftermarket head unit and just need to integrate the stock sub into your aftermarket system, metra makes a harness for that purpose as well(as I found out after I ordered this harness) and the model number of that harness is 70-5522. Either way, you really can't go wrong and this harness will get the job done and help you to install your aftermarket system with no cutting required to the stock harness. A caveat with the stock sub interface, tho. Be sure to also either install a ready made 12v to 5v inline converter on the remote turn on line, or, if you are aptly capable, install a 7805 regulator should you have one laying around(this was the route I took because I actually did have one laying around). The reason for this is to avoid a loud pop when turning on the amp because of a voltage mismatch between the common remote lead of most systems and the remote lead in on the stock amp.

By Vinnie on December 31, 2013

42

found this helpful.

Sonic saved us

My sisters fiance has an 04 f150. About a year ago when him and my sister came down from washington i took him to a local audio shop and he got a jvc 7 inch touch screen installed. We later found out that the factory sub no longer worked, went back to the shop and asked them to fix it. They said it would take 45 minutes (my sister didn't want to wait nor did her fiance). This last week they were down again and still no subwoofer. So i came to Sonic and got this harness. Pulled out the deck, hooked it up in about 15 minutes and wahh lahh. The sub worked again, without sonic we would have bought an amp wiring kit, and a new amp.

By Kyle on February 27, 2012

34

found this helpful.

1SG SETTLE

This piece was very easy to use and it took a lot of work out of the job I used it in a Mustang none of the colors were right but with this kit it really made it easy I highly recommend it

By TOP on April 12, 2015

31

found this helpful.

Seamless

This is what you need for your Ford 2005 Mach system (with subwoofer). Was worry about installation, but worked out perfect. The Sub does "POP" due to the 12V antenna from head unit. I hear you need a 5V conversion to solve this problem. Doesn't bother me now.

By Craig on February 16, 2015

31

found this helpful.

Super Easy

If you can match colors then you can hook up you radio in under 1 hour. I had to cut the wire covers a bit longer to wrap them befor clamping. All wires were labled also. Simple.

By Ted on January 2, 2015

31

found this helpful.

Perfect Fit!

This product was a great fit and simplified my do-it-yourself installation by making an easy connection/fit between the after market stereo wiring and the stock stereo harness. The only thing that would have made it perfect would be if the harness had the two orange wire dimmer connector that both the stock harness and after market stereo had. The dimmer switch on stereo face doesn't work because of this but the front still lights up and looks great. The team at Sonic included everything i needed.

By Sherry on December 30, 2013

30

found this helpful.

Great fit

This is the harness needed to interface an aftermarket head unit with the MACH system in my '04 Mustang.
Everything worked great!

By Slipperman on September 17, 2013

28

found this helpful.

Not complete for 2002 Expedition

Needed a second harness to activate the subwoofer. After a few back and forth emails to Sonic, they provided it free of charge.

By foyle on February 9, 2012

27

found this helpful.

NOTBAD

Its simple to install whether a pro or a beginner.
OK product for the price!

By Omar on December 14, 2015 Checkmark Icon Verified purchase

14

found this helpful.

Works perfectly

Must have to connect OEM plugs. Converts most wires from stock radio to new to radio.

By Monuntainlion on March 31, 2018

13

found this helpful.

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