Metra® 70-1856 - Wiring Harness with OEM Plugs and Amplifier Bypass

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Metra® - Wiring Harness with OEM Plugs and Amplifier Bypass
Metra® - Wiring Harness with OEM Plugs and Amplifier BypassMetra Authorized Dealer
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Metra Accessories

Wiring Harness by Metra®, with OEM Plugs and Amplifier Bypass. For aftermarket stereo. Metra preassembled wiring harnesses can make your car stereo installation seamless, or at least a lot simpler. With precrimped ends and prepopulated connectors, your wiring task will be highly simplified. These harness connectors will mate with your components exactly like the OEM connectors.



  • 17" Tuner relocation harness
  • Includes antenna extension
  • 21-pin plug
  • For non-Bose systems only
  • Allows for the installation of an aftermarket radio using the existing factory wiring and connectors
  • No cutting of factory wiring needed


  • Mates the aftermarket stereo with car wiring harness
  • Allow seamless integration of custom stereo with vehicle
  • Secure connection to existing connectors avoids splicing
  • Pin-to-pin compatibility
  • Color-coded wires


  • 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 (-)

Installing a custom stereo into a modern car can be a nightmare. Make your life easier by using a custom prewired harness from Metra. With preassembled connectors that mate with OEM connectors on the vehicle or your aftermarket electronics, making proper pinout is a breeze. Minimize hand crimps and splicing, especially in the cramped spaces inside the instrument panel or under the dash. Color-coded wires are easy to trace, making for fewer mistakes.

Metra has been a leader in the Car Audio business for over 50 years. With their various brands, including Axxess Integrate, Connects2, Raptor, Shuriken batteries, Tsunami, Install Bay installation hardware and the Metra Home Theater group, Audio Solutions, Ballistic and Ethereal, Metra has a solution for every car audio and home theater problem. Metra says if you can see one of their products, they’re not doing their job. That means they’re committed to making your car audio installation as seamless and simple as possible.

Part Number:

Vehicle Fitment

This part is compatible with 24 vehicle(s)
Year Make Model Fitment Notes:
1996 Cadillac Fleetwood
1996 Chevy Corvette
1995 Cadillac Deville
  • Concours
1995 Cadillac Eldorado
  • With Console Shift
1995 Cadillac Fleetwood
1995 Cadillac Seville
  • With Console Shift
1995 Chevy Corvette
1994 Cadillac Deville
  • Concours
1994 Cadillac Eldorado
  • With Console Shift
1994 Cadillac Fleetwood
1994 Cadillac Seville
  • With Console Shift
1994 Chevy Corvette
1993 Cadillac Eldorado
  • With Console Shift
1993 Cadillac Fleetwood
1993 Cadillac Seville
  • With Console Shift
1993 Chevy Corvette
1992 Cadillac Brougham
1992 Cadillac Eldorado
  • With Console Shift
1992 Cadillac Seville
  • With Console Shift
1992 Chevy Corvette
1991 Cadillac Brougham
1991 Chevy Corvette
1990 Cadillac Brougham
1990 Chevy Corvette

All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only.
It is neither inferred nor implied that any item sold by, is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page.