Metra 71-5520-1

Reverse Wiring Harness for Select 2003-2004 Ford, Lincoln, Mercury Vehicles OEM Premium Audio

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Warranty assistance for a year

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Metra Audio Store

Product Features:

  • 7" long wiring harness that plugs into OEM Radio
  • Includes one 24-Way plug for power and speaker, one 8-Way plug for premium sound, one 16-Way plug for changer and auxiliary
  • For select 2003-2007 Ford, Lincoln, Mercury vehicles
  • Harness is designed to plug in the factory radio
  • Can be used to repair a harness where the plugs have been cut off or damaged
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty
  • Check the Product Instructions to see basic instructions and compatibility list for the Metra 71-5520-1


  • 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 (-)

Harness Features

Main Harness Function
Different installations on different vehicles require different harnesses. This type is what the harness is considered. Each wiring harness we sell serves a purpose such as installing an aftermarket car stereo, integrating an aftermarket amplifier with your factory car stereo, connecting Bluetooth to your factory car stereo, and more.
Replace Original Vehicle Stereo Wiring Plug (Male Side)
Compatible Vehicle Make
Allows you to view only items that are compatible with your vehicle's make. Does not guarantee that it will work with your vehicle year or model.
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.
Ford Bronco
Ford Crown Victoria
Ford Econoline
Ford Escape
Ford Escort
Ford Expedition
Ford Explorer
Ford Focus
Ford Freestyle
Ford Fusion
Ford Mustang
Ford Ranger
Ford Taurus
Ford Thunderbird
Lincoln Aviator
Lincoln Continental
Lincoln LS
Lincoln Navigator
Lincoln Town Car
Mercury Grand Marquis
Mercury Mariner
Mercury Marquis
Mercury Milan
Mercury Mountaineer
Mercury Sable

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

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Average Attribution Rating

Browse 2 questions and 3 answers
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Why did you choose this?
Sonic Electronix Store
fits F 250 2008 with 3 plug premium sound system
david l on Aug 12, 2017
for work truck
Adam H on Oct 23, 2014
full pin plugs
CLIFFORD SCHULZE J on Jun 12, 2016
will this work for a 2007 Ford Taurus SE OEM radio? my OEM plug was cut off by the prior owner
wesley on Sep 14, 2015
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Product Summary


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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Metra 71-5520-1