About the Metra 70-6504 Amp Bypass Harness
This Metra 70-6504 amp bypass harness allows you to install a new car stereo in your car without having to cut the factory wiring.
Simply splice the colour-coded wires on your Crutchfield integration adapter to the wires from your aftermarket stereo — you can crimp or solder the connections in the comfort of your home without having to struggle with splicing wires behind your dash. Next, plug the Crutchfield integration adapter into the harness that you removed from your factory radio.
Since you didn't have to cut off your car's original radio connector, it's easier to put the factory radio back in when you sell your vehicle or return it at the end of the lease. Just plug the factory radio back in and keep the aftermarket stereo. Warranty: 60 days.
Note: This integration adapter bypasses your factory amplifier. In order to install it and make the necessary connections, you will need to run wires from the adapter to a switched power source and to your factory amp location, which varies depending on the vehicle. You'll lose the factory subwoofer when the amp is bypassed.
Please enter your vehicle information or call a Sales Advisor at 1-888-955-6000 to find out if this model is compatible with your vehicle.
What's in the box:
Metra 70-6504 Amp Bypass Harness owner's manual
- 6" Constant Power/Ground harness
- 17' Speaker harness
- 17' Tweeter/Center channel harness
- 42" Switched power wire
- Fuse tap
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Customer reviews for Metra 70-6504 Amp Bypass Harness
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More details on the Metra 70-6504 Amp Bypass 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 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:
(Constant Power/Ground Harness)
| Wire Color | Function |
| Yellow | +12 Volt Constant |
| Black | Ground |
(Tweeter/Center Channel Harness)
| Wire Color | Function |
| Yellow/Blue | Left Front Tweeter + |
| Yellow/Black | Left Front Tweeter - |
| Yellow/Red | Right Front Tweeter + |
| Yellow/Orange | Right Front Tweeter - |
| Brown/White | Center Speaker + |
| Blue/Pink | Center Speaker - |
(Power/Front Speaker Harness)
| Wire Color | Function |
| Green | Left Rear Speaker + |
| Green/Black | Left Rear Speaker - |
| Violet | Right Rear Speaker + |
| Violet/Black | Right Rear Speaker - |
| Gray | Right Front Speaker + |
| Gray/Black | Right Front Speaker - |
| White | Left Front Speaker + |
| White/Black | Left Front Speaker - |
| White/Red | Not Used |
| Green/White | Not Used |
| Brown/Blue | Not Used |
| Brown/Yellow | Not Used |
Notes:
- There is no switched power wire in any of the harnesses. An additional 42" red wire is included, along with a fuse tap to access a switched +12 volt source in the fuse block.
- The center channel speaker, if present, is not used in most aftermarket systems.
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Customer Q&A
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The kit specifies Magnum/Crysler. But this works well on a 2004 RAM. It make the job so much easier. To rewire the wires from the doors would have taken so much longer. For the money this wiring kit is excelent. I would highly recomment it.
ricktech from Connecticut