Skip Navigation

Metra 70-1742 Receiver Wiring Harness

Connect a new car stereo in select 1984-89 Nissan vehicles

8 Reviews

Find what fits your vehicle


Can't find your exact vehicle?

Item # 120701742

In Stock

Ships Today

Calculating shipping cut-off...

Add to Cart

Ask an expert

Our VA-based experts can help.




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

Metra 70-1742 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.


Note: You'll need to make a ground connection between your new receiver and your car's metal chassis.

  • 12V constant power
  • 12V switched power
  • power antenna 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.

just what I needed

kdhutc, Alabama

What's in the Box:

  • Receiver wiring harness

Metra 70-1742 Receiver Wiring Harness Reviews

Average Customer Review(s):

(8 Reviews)

Metra 70-1742 Receiver Wiring Harness

kdhutc from Alabama on 9/27/2015

1984 Nissan 300ZX
Crutchfield Customer Review (What's this?)

just what I needed

Pros: exactly the right thing to fit my car


Metra 70-1742

Ryan M from Ohio on 2/2/2015

1988 Nissan 300ZX
Crutchfield Customer Review (What's this?)

Perfect. Great instructions and a one time connection. Worked perfectly.

Pros: Color code was spot on. Worked perfect first time.

Cons: A bit vague on the power antenna connection. Worked great, but could have been confused for someone not paying attention!

Works good

Geoff W. from San Antonio, Tx on 4/2/2014

Crutchfield Customer Review (What's this?)

Matched right up with the original Nissan wiring. Only complaint was that it didn't come with any "butt connectors" to complete the install. Had to stop work on vehicle to go to parts store and buy them.



Did the Job

DerW from Caldwell ID on 4/19/2013

Crutchfield Customer Review (What's this?)

Worked fine to adapt my new stereo to factory wiring. In my case I did have to do some creative alterations due to the floating ground in my older Nissan & some weird re-wiring by the previous owner. That said, this harness adapter and the accompanying instructions fit my needs just fine.

Pros: Socket fit the factory harness fine Plenty of wire to work with

Cons: None

Easy "A"

Rick from New Jersey on 9/25/2012

Crutchfield Customer Review (What's this?)

As the title suggests this was easy to follow. No difficulties whatsoever.

Pros: Quality, instructions.

Cons: None

Metra 70-1742 Receiver Wiring Harness

Gregg from Apopka, Florida on 9/30/2010

1984 Nissan 300ZX
Crutchfield Customer Review (What's this?)

Works fine. I had to rewire the back speakers so they run directly off the headunit anyway.



Nissan 300ZX Receiver Wiring Adapter 120 70-1742

Jeff from Coronado, CA on 11/23/2008

Crutchfield Customer Review (What's this?)

Ran into a problem with the 120 70-1742 wiring adapter. White wire is not connected properly inside the connector thereby not allowing the left front speaker to work. Tested LF spkr output from radio is working fine. Also with a sound signal directly into the Nissan car mounted mate to the wiring adapter, the speaker does produce sound. Entire radio package works correctly with exception of LF speaker as described above.



Right on the money!

Walt from Houston, TX on 10/14/2008

1986 Nissan 300ZX
Crutchfield Customer Review (What's this?)

This harness fit my '86 300zx factory harness exactly as advertised, and the color coding matched the Clarion head unit I installed perfectly. It definitely made the wiring part of the install hassle free!




Hands-on research

Product Research


Wiring Harness: This 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 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 & sold separately.

Wire Code Chart:

Wire Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Blue Power Antenna
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?

It is a snap to hook up your system with this! [ George  Nov 03, 2016 ]
Prior knowledge & Recommendation [ Robert  Oct 28, 2016 ]

Searches related to the Metra 70-1742 Receiver Wiring Harness Connect a new car stereo in select 1984-89 Nissan vehicles