Metra 70-5603 Wiring Harness

Install a new car stereo and retain factory amplifier in select 1995-2004 vehicles from Ford, Mazda, Lincoln

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

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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-705603.

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Product Features:


  • Red - Ignition/Accessory Wire of Aftermarket Radio
  • Yellow - Radio 12 Volt Battery or Memory Wire
  • Black - Radio Ground Wire
  • Orange/White - Illumination Wire of Aftermarket Radio
  • White - RCA to Left Front RCA Output of Aftermarket Radio
  • Gray - RCA to Right Front RCA Output of Aftermarket Radio

Compatible Vehicles

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

  • 1995 Ford Crown Victoria
  • 1995 Ford Explorer
  • 1995 Ford Ranger
  • 1995 Lincoln Continental
  • 1995 Lincoln Mark VIII
  • 1995 Mazda B2300
  • 1995 Mazda B3000
  • 1995 Mazda B4000
  • 1995 Mercury Grand Marquis
  • 1996 Ford Crown Victoria
  • 1996 Ford Explorer
  • 1996 Ford Ranger
  • 1996 Lincoln Continental
  • 1996 Lincoln Mark VIII
  • 1996 Mazda B2300
  • 1996 Mazda B3000
  • 1996 Mazda B4000
  • 1996 Mercury Grand Marquis
  • 1997 Ford Crown Victoria
  • 1997 Ford Escort
  • 1997 Ford Explorer
  • 1997 Ford Ranger
  • 1997 Lincoln Continental
  • 1997 Lincoln Mark VIII
  • 1997 Mazda B2300
  • 1997 Mazda B3000
  • 1997 Mazda B4000
  • 1997 Mercury Grand Marquis
  • 1997 Mercury Mountaineer
  • 1998 Ford Escort
  • 1998 Ford Escort ZX2
  • 1998 Ford F-250
  • 1998 Lincoln Mark VIII
  • 1998 Lincoln Navigator
  • 1998 Mazda B Series
  • 1999 Ford Escort
  • 1999 Ford Escort ZX2
  • 1999 Ford F-250
  • 1999 Ford F-250 Super Duty
  • 1999 Ford F-350 Super Duty
  • 2000 Ford Escort
  • 2000 Ford Escort ZX2
  • 2000 Ford F-250 Super Duty
  • 2000 Ford F-350 Super Duty
  • 2001 Ford Escort
  • 2001 Ford Escort ZX2
  • 2001 Ford F-250 Super Duty
  • 2001 Ford F-350 Super Duty
  • 2002 Ford Escort
  • 2002 Ford Escort ZX2
  • 2002 Ford F-250 Super Duty
  • 2002 Ford F-350 Super Duty
  • 2002 Ford F-450 Super Duty
  • 2003 Ford F-250 Super Duty
  • 2003 Ford F-350 Super Duty
  • 2004 Ford F-250 Super Duty
  • 2004 Ford F-350 Super Duty

Specifications & Details

Harness Features
Main Harness Function
Install a Car Stereo & Retain the Factory OEM Amplifier
Premium Harness Features
Factory System Amplification
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details


Model Number:




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Customer Ratings & Reviews

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Customer Reviews

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Very Happy!

We really like this radio, had some difficulty figuring out the wiring but the folks at Sonic were absolutely great at sorting it out. The customer service was top notch.

By Martin on October 1, 2014


found this helpful.

This product solved my problem

I have a 1998 F150 Extended cab Silver Anniversary Special that I bought new. I finally decided to upgrade the audio system with a Pioneer Bluetooth Radio. I ordered or purchased three separate wiring adapters that were suppose to work for this conversion but the did not. This truck had a separate power amp that was not in the original radio. I called Sonic and their technician told me I needed the Metra 70-5603. I ordered it and the installation was easy and the new receiver works as advertised.

By Oldtucsonjack on February 2, 2015


found this helpful.


This made the installation of my Dual XDVD176BT so easy and the best thing is SE gives it to you free with the purchase of the receiver. Thanks, Sonic Electronic.

By BRENTON on September 15, 2020 Checkmark Icon Verified purchase


found this helpful.

By Che on March 5, 2024 Checkmark Icon Verified purchase


found this helpful.

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