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Metra 70-6504 Amp Bypass Harness

Allows you to install a new car stereo and bypass the factory amplifier in select Jeep, Chrysler, and Dodge vehicles

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  • Metra 70-6504 Amp Bypass Harness

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Our take on the Metra 70-6504 Amp Bypass Harness

by Charlie Pastorfield

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 color-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.

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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 above the kick panel on the driver's side. 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.

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 from the Crutchfield Labs (what are the Labs?)

Product Research
What's in the box?

Download owner's manual

  • 6" Constant Power/Ground harness
  • 17' Speaker harness
  • 17' Tweeter/Center channel harness
  • 42" Switched power wire
  • Fuse tap
  • Instructions

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.

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:

(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.

The Crutchfield Car Selector: Please visit the Crutchfield Car Selector for your specific vehicle.

 
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Metra 70-6504 Amp Bypass Harness Reviews

Average Customer Review:

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5 out of 5

Magnum rt amp bypass

Written By Anonymous, Jacksonville, fl on Wednesday, April 09, 2014
Crutchfield Customer Review (What's this?)
 
Everything works great. Item performs as described. Great value and simple install.
Pros:
Cheap alternative to comprehensive wiring harness with steering controls
Cons:
Lose steering wheel volume control
Was this review helpful?    Yes | No
 
5 out of 5

The right way to go

Written By JHester, Nashville tn on Sunday, March 30, 2014
Crutchfield Customer Review (What's this?)
 
I was iffy at first about bypassing my factory amp, but now that it's done my vehicle rocks. Bypassing the factory amp really woke my factory Alpine speakers up. Before I either had a little bass or all lyrics. Now I have alot of bass and lyrics, best of both worlds.
Pros:
My new sounds quality keeping the factory speakers. .. and the price through Crutchfield.
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Easy install

Written By Relax, Gurnee, illinois on Saturday, August 03, 2013
Crutchfield Customer Review (What's this?)
 
So easy to use.
Was this review helpful?    Yes | No
 
5 out of 5

2007 Dodge Ram QC

Written By Justin R, Barre, MA on Tuesday, October 23, 2012
Crutchfield Customer Review (What's this?)
 
I'm giving it 5 stars even though I didn't use it. The tech from Crutchfield was absolutely awesome in making sure this would fit. I just bought the truck and it came with a Pioneer AVIC Z120BT but the sound wasn't that great. So, after some researching, I found these products to bypass or use with the factory Infinity amp. I get the bypass kit, take my dash apart and there was an AXXESS CHTO-013 amp interface. Everything was hooked up except for the switched pos. I hooked it up and the sound was awesome. I'm still keeping the bypass kit just in case.
Pros:
Tons of extra wire
Cons:
Tons of extra wire
Was this review helpful?    Yes | No
 
1 out of 5

Metra 70-6504 Amp Bypass Harness

Written By Dave, Newport, Minnesota on Sunday, July 01, 2012
Crutchfield Customer Review (What's this?)
 
they sent me the totally WRONG wire harness. It was of no use to me at all. The radio had to be hard wired to the van. We called for help and they said they were sorry! SORRY does not help me out at all! Too many people think by saying sorry makes it all better. It is a slap in the face that no one owned this problem at Crutchfield. NOTE: none of the plugs fit my van wiring, this was for something else.
Pros:
It looked good in the bags.
Cons:
wrong harness which is of no use.
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5 out of 5

Great product

Written By johnnyd, Trenton, Nj on Thursday, April 19, 2012
Crutchfield Customer Review (What's this?)
 
product was so simple to install and made the whole job that much easier
Was this review helpful?    Yes | No
 
5 out of 5

Awesome

Written By Joe l, Cohoes ny on Thursday, January 26, 2012
Crutchfield Customer Review (What's this?)
 
This was the best wiring kit I have ever purchased
Pros:
Life is good with something this easy to use. Went from front of car all the way to trunk with about 6 feet of extra wire.
Cons:
None
2 out of 2 people found this helpful
Was this review helpful?    Yes | No
 
5 out of 5

2005 magnum

Written By Ted, Wyandotte, Mi on Thursday, June 30, 2011
 
05 Magnum R/T perfect worked flawlessly just had to get a 12v switch the cig lighter dosent work i used a fuse in the trunk but 100% perfect workiing and did all work myself wire it up run the wires and plug it in an put back together
1 out of 1 people found this helpful
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5 out of 5

Works for dodge charger

Written By charger 2007, Milwaukee on Tuesday, March 10, 2009
 
Excellent product!
1 out of 2 people found this helpful
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5 out of 5

Works on Ram 1500

Written By ricktech, Connecticut on Tuesday, August 26, 2008
Crutchfield Customer Review (What's this?)
 
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.
4 out of 6 people found this helpful
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5 out of 5

Awesome wiring harness!

Written By Daren, Fresno, CA on Friday, November 17, 2006
Crutchfield Customer Review (What's this?)
 
This wiring harness made it so easy to bypass the factory Infinity amp in my 2006 Ram. As an added bonus, the harness includes high quality speaker wiring that was more than long enough to go all the way to my aftermarket amp under the seats. It consists of a plug that attaches to where all 7 factory speaker locations connect to the aftermarket amp.

I could not find this anywhere locally, local shops wanted to sell me a $100 bypass kit.
Tip: You will need to find switched power elsewhere in this vehicle. I used the cigarette lighter on the left side of the center panel.
103 out of 130 people found this helpful
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For a more in-depth review and enhanced detailed information on the Metra 70-6504 Amp Bypass Harness, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_120706504/Metra-70-6504-Amp-Bypass-Harness.html ).

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