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Metra 70-8405 Receiver Wiring Harness

Connect a new car stereo in select 1999-08 Chevrolet, Daewoo, and Suzuki vehicles

Item # 120708405

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

Find what Fits your car

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

California customers:
Please click here for your Proposition 65 warning.

Item # 120708405

In stock

About the Metra 70-8405 Receiver Wiring Harness

Metra 70-8405 Receiver Wiring Harness

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

Metra 70-8405 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.


  • 12V constant power
  • 12V switched power
  • chassis ground
  • power antenna turn-on
  • amplifier turn-on
  • illumination
  • left front speaker +/-
  • right front speaker +/-
  • left rear speaker +/-
  • right rear speaker +/-

What's in the box:

MFR #70-8405

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Crutchfield response

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More details on the Metra 70-8405 Receiver Wiring Harness

Stacey B.

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/Front Speaker Harness)

Wire Color Function
Yellow +12 Volt Constant
Red +12 Volt Accessory
Orange Illumination
Black Ground
Blue Power Antenna
Blue/White Amplifier Turn-on
Green Left Rear Speaker +
Green/Black Left Rear Speaker -
Violet Right Rear Speaker +
Violet/Black Right Rear Speaker -
Gray Right Front Speaker +
Gray/Black Right Front Speaker -
White Left Front Speaker +
White/Black Left Front Speaker -

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Customer Q&A

Crutchfield asked: Why did you buy this?
Using the wiring harness connectors make installation a breeze. [ Enrique  Mar 11, 2020 ]
Came with the install kit [ Teresa  Nov 25, 2019 ]
It is plug and play [ Steven  Apr 15, 2019 ]
Makes installation a snap. [ W  Oct 27, 2018 ]
good price [ Anthony  Aug 24, 2018 ]
because i need it [ james  Jul 25, 2018 ]
Because it is the correct connection for my equipment. [ Oscar  Jul 16, 2018 ]
The free wiring harness makes installation much easier. And Amazon doesn't give you one. [ Matthew  Jun 18, 2018 ]
We always used Metra products for professionals installation in the shop I worked for. Always great quality. [ A  Mar 27, 2018 ]
It comes with the receiver...I am getting the pre-connected harness as well. [ Stanley  Aug 15, 2017 ]
It is an all around good choice with good quality for price [ Jared  May 19, 2017 ]
I need a new radio with Bluetooth [ Matthew  Mar 07, 2017 ]
To retain factory wiring. [ Kevin  Mar 01, 2017 ]
Piece of cake to install [ Alejo  Feb 04, 2017 ]
Been looking for this wire harness for a month no one has it until now thank you so much for making my life easier. [ Tommy  Jan 24, 2017 ]
Because it makes hooking up everything a whole lot easier. [ Lawrence  Dec 03, 2016 ]
makes the job easier... ;) [ James  Sep 28, 2016 ]
The wiring harness is required in order to install an aftermarket stereo... [ Neil  Sep 27, 2016 ]
It was included in the kit [ Craig  Sep 19, 2016 ]
I couldn't find it anywhere else where I live and I've bought speakers before from you guys and knew u guys would have it [ Kyle  May 21, 2016 ]
fits [ sean  Apr 20, 2016 ]
They fit my vehicle and are in stock... [ Justin  Apr 02, 2016 ]
This wiring harness is made to adapt the aftermarket receiver to my stock wiring harness. [ Michael  Mar 29, 2016 ]
I like the presentation the this product. Thank you for help me [ Paula  Jan 21, 2016 ]
Easy installation to factory speakers. [ Scott  Dec 14, 2015 ]

1 question already asked

Does fit any radio after wiring in to car's connector? Swapping different brands of radio, Boss to a Kenwood.
[ Zito  Feb 12, 2018 ]
1 answer
Yeah the Metra 70-8405 Receiver Wiring Harness is designed to work with any aftermarket head unit's wire harness; including Boss and/or Kenwood. For more details or to discuss further, please contact an Advisor directly by phone (888.955.6000) or online chat. Thanks! :)
[ Larry  Feb 18, 2018 ]  Staff

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