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Metra 70-8405 Receiver Wiring Harness

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

31 Reviews

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Item # 120708405

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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 +/-

Note: Most vehicles will require additional installation parts — please identify your vehicle if you haven’t done so. You can also call an Advisor for more information.

This harness was incredibly easy to use and color match with my install!

Anonymous, Minneapolis, MN

What's in the Box:

  • Power/Speaker harness

Metra 70-8405 Receiver Wiring Harness Reviews

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(31 Reviews)
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Hands-on research

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 -

The Crutchfield Car Selector: Please visit the Crutchfield Car Selector for your specific vehicle.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

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 ]

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