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Metra 70-1782 Receiver Wiring Harness

Connect a new car stereo in select 1985-99 General Motors, Isuzu, and Suzuki vehicles

25 Reviews | 1 question - 1 answer

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Item # 120701782

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

Metra 70-1782 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
  • 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.

No issues, worked just fine, no complaints.

Ben, Slater, IA

What's in the Box:

  • Receiver wiring harness

Metra 70-1782 Receiver Wiring Harness Reviews

Average Customer Review(s):

(25 Reviews)
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Hands-on research

Product Research


Wiring Harness: This wiring harness prevents 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 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 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 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 and sold separately.

Wire Code Chart:

Wire Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Black Chassis Ground
Orange Illumination
White Left Front Speaker +
White/Black Left Front Speaker -
Gray Right Front Speaker +
Gray/Black Right Front Speaker -
Green Left Rear Speaker +
Green/Black Left Rear Speaker -
Violet Right Rear Speaker +
Violet/Black Right Rear Speaker -

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?

Will fit and makes hook up to factory wireing a breeze [ Thomas  Apr 28, 2017 ]
So I can plug my new Stereo in. [ Steve  Mar 22, 2017 ]
Needed to replace the back door speakers [ Andrew  Mar 14, 2017 ]
This for my 99 Suzuki [ JUAN M  Mar 07, 2017 ]
fix stereo [ Toby  Dec 28, 2016 ]
needed for installation and it was free [ Bryan  Nov 30, 2016 ]
You have to know what you want, be it price, performance, or straight out glitz. This beauty, with all it has to offer, is why it will reside in my second home! [ Brian  Nov 14, 2016 ]
Recommended [ Becky  Oct 20, 2016 ]
Factory car stereo was going bad [ Richard  Jul 29, 2016 ]
it was recommened for the stereo [ Kristin A.  Jul 29, 2016 ]
Makes it easier to install a new head unit without having to splice in on the cars wiring harness [ Joseph  May 22, 2016 ]
These SHOULD fit the factory speaker harnesses in my Dad's LeMans. Makes for a quick and easy upgrade. [ Michael  Apr 08, 2016 ]
You don't have to cut your factory wires [ Robert  Feb 21, 2016 ]
Makes installation a breeze!! [ Dale  Dec 11, 2015 ]

1 question already asked

The Metra 70-1782 wire harness consists of a 13-pin plug with 7 pins along the bottom and 6 pins along the top half. For more detailed assistance specific to your installation, I would recommend contacting an Advisor directly by phone (888.955.6000) or online chat--they can help determine what will be needed to get your system up and running! [ Larry  May 29, 2017 ]  Staff

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