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Metra 70-9400 Receiver Wiring Harness

Connect a new car stereo in select 1993-98 Land Rover vehicles

Item #: 120709400

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8 Reviews | Ask Questions

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Metra 70-9400 Receiver Wiring Harness

Installation Note: This harness uses your factory amplifier; your new stereo must have two pairs of preamp outputs to connect this 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 makes installing your new stereo easier, and allows you to put the factory radio back when you sell your vehicle or return it at the end of the lease. 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: 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.

  • 12V constant power
  • 12V switched power
  • chassis ground
  • Illumination
  • left front channel RCA connector
  • right front channel RCA connector
  • left rear channel RCA connector
  • right rear channel RCA connector
  • amp turn on
  • power antenna

Metra 70-9400 Receiver Wiring Harness Reviews

Average Customer Review:

8 Reviews

Fine for the Money

Written by: Scooter from Truckee, CA on October 23, 2015

1998 Land Rover Discovery
Crutchfield Customer Review (What's this?)

I used this to replace the OEM head unit in my 98 Land Rover Discovery. Plug and play was simple enough, but it took a few calls to Crutchfield (wow, they're good!) to get a few dead end wires buttoned up. I'm still dealing with a mildly annoying alternator whine, but have confidence that with the help of Crutchfield support I'll get it figured out sooner or later. If there was a higher end product for a bit more I would have shelled out for it, and I MAY have had fewer issues with the install.

Pros: Price

Cons: Installation (on my vehicle at least) took a few tweaks to the harness.

great product

Written by: trey from Vernon fl on June 10, 2015

1995 Land Rover Discovery
Crutchfield Customer Review (What's this?)

Very easy to hook up. Took me 10 minutes. Great price also



Land Rover

Written by: sTeVo from Lihue, Hawaii on May 19, 2014

1996 Land Rover Discovery
Crutchfield Customer Review (What's this?)

Great product. Works excellent

Pros: Works great

Cons: Nothing bad

Great solution

Written by: Becki from Buffalo, NY on April 23, 2014

1996 Land Rover Discovery
Crutchfield Customer Review (What's this?)

Worked perfectly to upgrade the receiver in my 1996 Land Rover Discovery. Very easy to install. Excellent instructions.



Metra 70-9400 Receiver Wiring Harness

Written by: Anonymous from Corvallis, MT on April 9, 2013

1993 Land Rover County LWB
Crutchfield Customer Review (What's this?)

Simple answer to install.

Pros: Good fit

Cons: Not scosches fault, but the vehicle is a bugger to fit all the wire and connector in behind the deck. If your really gonna consider reinstalling factory deck it's perfect. If your not, hardwire and save the headaches of fitting the bundle behind deck.

Harness incorrectly wired

Written by: Ryan S from San Francisco, CA on December 29, 2012

Generally easy to install - however, the harness is incorrectly wired and the provided speaker grounds cause buzzing. I had to call Crutchfield support (they were great by the way) to correct the problem - which involved rewiring the harness to connect an additional lead from the ground.

Pros: All the wires are there, instructions

Cons: Bulky harnesses, incorrect wiring, didn't fit in my dash with the stereo and original harness.


Written by: Jeff B from Edmonton, AB on August 25, 2012

No issues here, soldered up the wires to the harness on the new Alpine deck, had to cut off the RCA plugs and solder the speaker wires together, but that was easy. Plugged it in, everything works!

04 Land Rover Discovery



Rover Speaker wire harness problems

Written by: Jared from SLC, UT on October 26, 2010

1997 Land Rover Discovery
Crutchfield Customer Review (What's this?)

This Harness came with a single common ground wire for all channels, and that wire was
lined up opposite an empty slot on the factory side. I moved the ground to match the factory
ground, but the Kenwood receiver wouldn't accept a common ground. Ended up wiring to
RCA plugs and using the front and rear RCA outputs connected to the harness with the
adjusted ground, then plugging into the factory harness.... but had to use ground loop
isolators on both outputs. Sounds great now.



Hands-on research

What's in the box?

Download owner's manual

  • 8" Power harness
  • 10" Speaker preamp harness

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 Harness)

Wire Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Black Chassis Ground
Blue Amp Turn-On
Orange Illumination

(Speaker Preamp Harness)      

RCA Color Function
White Left Front Speaker +
Gray Right Front Speaker +
Green Left Rear Speaker +
Violet Right Rear Speaker +

Installation Note: The aftermarket receiver must have front and rear preamp outputs; if not, you will need to add a line out converter (142SLC4, sold separately).

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

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