About the Metra 70-5004 Receiver Wiring Harness
Metra 70-5004 Receiver Wiring Harness
Metra 70-5004 Receiver Wiring Harness
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 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:
Note: This includes a "jumper" bypass harness that will route your signal around your factory amplifier. You will need to access your factory amp in order to make the bypass harness 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 +/-
What's in the box:
Metra 70-5004 Receiver Wiring Harness owner's manual
- Receiver wiring harness (power)
- Receiver wiring harness (speaker)
- Amplifier bypass wiring harness
- Instructions
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Customer reviews for Metra 70-5004 Receiver Wiring Harness
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More details on the Metra 70-5004 Receiver Wiring Harness

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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 and sold separately.
Wire Code Chart:
Harness #1 Power
Wire Color | Function |
Red | +12 Volt Accessory |
Yellow | +12 Volt Constant |
Black | Chassis Ground |
Blue | Power Antenna |
Blue/White | Amp Turn-On |
Orange/White | Dimmer |
Orange | Illumination |
Orange/Black | Not used (tape off) |
Harness #2 Speakers
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 - |
Harness #3 Amplifier Bypass
This harness is essentially plug 'n play with the factory amplifier harness plugs.
The Crutchfield Car Selector: Please visit the Crutchfield Car Selector for your specific type of vehicle.
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Customer Q&A
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This wiring harness was perfect for my 91' lincoln towncar.. In addition to to the normal wiring harness , the towncar needs a bypass cable to bypass the factory amplifier...failing to do so makes for distortion..This kit came with everything needed to do the job.. I am Very pleased !!
Palehorse95 from Church Hill , TN