Metra 70-1822 Receiver Wiring Harness

Connect a new car stereo in select 1985-91 Porsche, Merkur, and Sterling vehicles

Item #: 120701822

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Metra 70-1822 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 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.

Connections:

  • 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, then check here for a list of parts. You can also call an Advisor for more information.

Hands-on research

What's in the box?

Download owner's manual

  • 7.75" Power/ground harness
  • Four 7.75" Speaker harnesses
  • Instructions

Product Research

Features

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 Ground
Blue Power Antenna
Orange/White Dimmer

(4 Speaker Harnesses - Left Front, Right Front, Left Rear, Right Rear)

Wire Color Function
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 -

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 open the box, verify contents, 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.

Metra 70-1822 Receiver Wiring Harness Reviews

Average Customer Review:

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Wiring harness

Written By Jake, Omaha, NE on Tuesday, September 16, 2014

Crutchfield Customer Review (What's this?)

I recently had to replace the stereo head in my Porsche. It amazed me that Crutchfields would have a harness that had exactly the same connectors that were in the car! The entire process took about 45 minutes, mostly soldering the new adapter to the harness that came with the head, and the system worked perfectly. I am so pleased, the cost was minimal, and the instructions were excellent. I would never have thought they would have a harness for a 26 year old Porsche, but they did, and it's great!

Pros: Order help Perfect fit and adaptability Easy to follow instructions

Cons: None

Piece of Cake

Written By DaveW, Akron, OH on Tuesday, May 20, 2014

Crutchfield Customer Review (What's this?)

Perfect match to existing 1987 Porsche 944 harness. I was amazed. No place to make a mistake, and no cutting of the old wiring. Snap it in, turn it on, hear music.

Pros: Obviously engineered to do what it is supposed to, and does it well.

Cons: None

Exactly what's needed

Written By Steve W, Maywood, NJ on Friday, January 10, 2014

Crutchfield Customer Review (What's this?)

This is the perfect bridge between the old style and the new style Balupunkt units. Don't try to replace your radio without this.

Pros: Keeps all parts intact, so no cutting of wires is required.

Cons: Very few

Merkur wiring harness adapter installation

Written By Tiberius, Cleveland, Ohio on Monday, October 03, 2011

Crutchfield Customer Review (What's this?)

Swapping out the factory installed headunit and amp was made simple with this kit. The only modification I needed to make was to file flat the areas where the speaker connectors back up to one another to allow a good fit.

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