About the Metra 70-1781 Receiver Wire Harness
Metra 70-1781
Metra 70-1781
This vehicle-specific wiring harness makes connections between your new car stereo and your car's electrical system.
First, attach the colour-coded wires on your harness to the wires from your new stereo. If you don't know how to use a soldering iron, we recommend that you purchase some wire connectors that you'll use to attach this harness to your factory harness.
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. 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 (see Details for a list of connections). You will need a special adapter if you want your factory steering wheel audio controls to work with your new stereo.
What's in the box:
Metra 70-1781 Receiver Wire Harness owner's manual
- 6.5" Receiver constant power harness
- 6.5" Receiver accessory power harness
- 6.5" Receiver front speaker harness
- 6.5" Receiver rear speaker harness
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Customer reviews for Metra 70-1781 Receiver Wire Harness
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More details on the Metra 70-1781 Receiver Wire Harness

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Features
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 vehicles 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 | Amp Turn-On |
Orange/White | 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 - |
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Customer Q&A
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Worked great as usual. I have bought multiple of these harnesses for different cars and they always work great. The instructions make it super easy.
Jezua from Missoula, MT