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Metra 70-1398 Receiver Wiring Harness

Connect a new car stereo in select 1981-92 Toyota and Daihatsu vehicles

Item #: 120701398

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Metra 70-1398 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: The 12V constant power lead may not be present in some 1982-84 Toyota models. If not present, and your receiver requires a constant 12V memory lead (most do), run a wire directly to the battery or an appropriate un-switched fuse.

  • 12V constant power
  • 12V switched power
  • chassis ground
  • power antenna turn-on
  • dimmer
  • 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.

Metra 70-1398 Receiver Wiring Harness Reviews

Average Customer Review:

7 Reviews

Worked great

Written by: William The Cat from California on December 27, 2015

1985 Toyota Pickup
Crutchfield Customer Review (What's this?)

made things very easy to wire up and understand



great adapter

Written by: Dale from North Carolina on November 11, 2015

1985 Toyota Pickup
Crutchfield Customer Review (What's this?)

great connection drawings, really made for a clean installation.



Metra 70-1398 Receiver Wiring Harness

Written by: MikeZ from Connecticut on September 18, 2015

1985 Toyota Celica
Crutchfield Customer Review (What's this?)

Great for when the previous owner decides that you won't be needing your original speaker wiring

Pros: Good value


Toyota/Daihatsu Receiver Wire Harness

Written by: Bruce F. from Barnardsville, NC on December 18, 2013

1981 Toyota Cressida
Crutchfield Customer Review (What's this?)

Perfect fit and easy to follow instructions.



Metra 70-1398 Receiver Wiring Harness

Written by: Anonymous from Broomfield on June 22, 2013

Crutchfield Customer Review (What's this?)

The wiring harness made installation a snap! Instructions were clear and accurate.




Written by: pat from mt on March 7, 2013

Crutchfield Customer Review (What's this?)

worked great was color coded. snapped rigth into place. made things very simple



Metra 70-1398 Receiver Wiring Harness

Written by: C from Colonial Beach, Va. on January 18, 2013

1985 Toyota Supra
Crutchfield Customer Review (What's this?)

Exact match with factory wire connection.

Pros: Work fine with new radio

Cons: none

Hands-on research

What's in the box?

Download owner's manual

  • 7.5" Power/front speaker harness
  • 7.5" Rear speaker 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:

(Switched Power/Front Speaker Harness)

Wire Color Function
Red +12 Volt Accessory
Black Chassis Ground
Blue Power Antenna
Orange/White Dimmer
White Left Front Speaker +
White/Black Left Front Speaker -
Gray Right Front Speaker +
Gray/Black Right Front Speaker -

(Constant Power/Rear Speaker Harness)

Wire Color Function
Yellow +12 Volt Constant
Gray/Black Right Front Speaker -
Green Left Rear Speaker +
Green/Black Left Rear Speaker -
Violet Right Rear Speaker +
Violet/Black Right Rear Speaker -

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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