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Metra 70-6512 Amp Bypass Harness

Connect a new car stereo and bypass the factory amp in select 2002-04 Dodge Ram trucks with Infinity

Item # 120706512

The Metra 70-6512 harness enables you to install a new car stereo in your Ram truck.

Find what Fits your car

The Metra 70-6512 harness enables you to install a new car stereo in your Ram truck.

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Item # 120706512

In stock
$34.99
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About the Metra 70-6512 Amp Bypass Harness

Metra 70-6512

The Metra 70-6512 harness enables you to install a new car stereo in your Ram truck. It uses a "jumper" to bypass the factory Infinity amplifier, which means you don't have to run new speaker wire from your new radio to your car's speakers — this saves you a lot of time on the installation, so you can start enjoying your music sooner.

Metra 70-6512

The Metra 70-6512 harness enables you to install a new car stereo in your Ram truck. It uses a "jumper" to bypass the factory Infinity amplifier, which means you don't have to run new speaker wire from your new radio to your car's speakers — this saves you a lot of time on the installation, so you can start enjoying your music sooner.

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. Please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this harness is compatible with your vehicle. Warranty: 1 year.

Installation Note: In 2004, Dodge offered two different amplifiers for different trim packages. The 70-6512 harness works with the SRT10 trim package without the hands-free calling option. If you're not sure, look at your rear-view mirror — if you don't see an icon of a telephone on it, this harness will work.

READ LESS

What's in the box:

  • 8" Power/ground harness
  • 16.5' Amplifier bypass harness
  • Installation Instructions
MFR #70-6512

Customer reviews

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Metra 70-6512 Amp Bypass Harness reviews

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11 reviews

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Metra 70-6512 Amp Bypass Harness

Crutchfield customer from Perdido Beach, AL on 8/2/2019

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Worked perfectly.

Pros:

Cons:

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Metra 70-6512 Amp Bypass Harness

Crutchfield customer from Wildomar, CA on 5/26/2019

2004 Dodge Ram 2500

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Makes setup easy!

Pros: Easy to do

Cons: Wires a bit too long

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Wrong harness sent for 04' Dodge Ram 1500

Crutchfield customer from Kingsport, TN on 1/26/2019

2004 Dodge Ram 1500

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Wrong harness was sent & no screws for the radio I bought. I ended up spending 25$ last minute upon installing.

Pros:

Cons:

Crutchfield response on 1/29/2019
Once we saw this review, our Tech Support specialist, AJ, reached out to this customer to help. Whenever you encounter a problem with anything you purchase from Crutchfield, please contact our Tech Support team right away. Lifetime tech support comes with every Crutchfield purchase.

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Metra 70-6512 Amp Bypass Harness

Crutchfield customer from N Charleston, SC on 12/24/2018

2004 Dodge Ram 2500

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Great harness

Pros:

Cons:

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Metra 70-6512 Amp Bypass Harness

Crutchfield customer from Hawkins, WI on 7/17/2018

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fit great to bypass the factory amp... amp location sucks on 04 dodge ram to remove and connect wires

Pros:

Cons:

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1 of 1 found this helpful

Metra 70-6512 Amp Bypass Harness

Crutchfield customer from Savage, MN on 5/11/2018

2004 Dodge Ram 1500

Verified customer (What's this?)
Verified employee purchase (What's this?)

Nothing against this part, I needed the 6510 so it took me about a week longer to install the unit than I wanted it to. Crutchfield service took great care of making it right, I just didn't have the time available to work on it again until a week later.

Pros:

Cons:

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Makes life easier ,, fit as it should

Paul from Levittown, PA on 4/11/2018

2004 Dodge Ram 1500

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Fits as it should ,,, nice

Pros: plugged right in ,, no issues

Cons: none found

Crutchfield response on

0 of 0 found this helpful

Works great 2004 Dodge Ram

Mike from Florence, OR on 3/10/2018

2004 Dodge Ram 1500

Verified customer (What's this?)
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This worked fine in bypassing my factory amp, no shortage of wire (had to trim 4' or so off of the harness during install), no problems with this at all!

Pros:

Cons:

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Metra 70-6512 Amp Bypass Harness

Thomas from Monument, CO on 3/1/2018

2004 Dodge Ram 2500

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Worked great but way too much extra length of wiring for my 2004 Dodge Ram 2500 with Infinity System. Definitely simplified the process.

Pros:

Cons:

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Metra 70-6512 Amp Bypass Harness

Crutchfield customer from Crested Butte, CO on 11/11/2017

2004 Dodge Ram 2500

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Installation was a pain due to the amp location but the harness worked flawlessly.

Pros:

Cons:

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Metra 70-6512 Amp Bypass Harness

Crutchfield customer from Eatonville, WA on 7/16/2017

2004 Dodge Ram 3500

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In the end, harness worked. However, the instructions stated the wiring diagram was on the back of the package. The back of the package was blank. The wires were marked, although the writing was very hard to make out.

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More details on the Metra 70-6512 Amp Bypass Harness

Stacey B.

Product Research

Features

Compatibility: The Metra 70-6512 is an amplifier bypass harness for 2002-2004 Dodge Ram trucks with Infinity factory amplifier. In addition to the amplifier bypass harness, a power harness is also included for your aftermarket head unit.

Notes:
  • In 2004 Dodge offered two different amplifiers for different trim packages. The 70-6512 harness is designed for the SRT10 trim package without the hands free capable option. The way to tell if the vehicle has hands free option is to look at the rear view mirror and see if it has an icon of a telephone on it. If there is no icon this harness will work.
  • The factory amp has the crossover built in. When bypassing the factory amp be sure to use crossovers to protect the factory speakers.

  • The factory amp is located behind the glove box.

Wire Code Chart:

(Power Harness)

Wire Color Function
Yellow +12 Volt Constant
Red +12 Volt Accessory
Orange Illumination
Black Ground

(Amplifier Bypass 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 -
Yellow/Blue Left Front Tweeter (+)
Yellow/Black Left Front Tweeter (-)
Yellow/Red Right Front Tweeter (+)
Yellow/Orange Right Front Tweeter (-)

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
Came as part of an installation kit [ Bruce  Jul 26, 2019 ]
A
Finally getting to upgrade the stereo in the truck. And this will greatly speed up the install and help bypass the factory amp. If you want the correct bypass harness buy from here. Tech help, and customer service is Great! [ Linzie  Jan 17, 2019 ]
A
dexter told me to [ sadie  Jan 16, 2019 ]
A
I chose this to bypass the stock amplifier, I'm going with subs later in the future so the front door only picking up a bass signal is counter productive. also its speed up installation time [ MICHAEL  Oct 15, 2018 ]
A
I installed a new radio and the speakers do not work without it. [ Dylan  Jul 04, 2018 ]
A
Needed [ Richard  Jan 30, 2018 ]
A
Been using Crutchfield for 30 years, even for the 12 years I had a professional audio installation shop. If they say this is a good idea, go ahead and get it. [ Domingo  Sep 12, 2017 ]
A
Ease of installation! [ Kevin V.  Sep 02, 2017 ]
A
I incorrectly ordered this. I am going to request a return authorization number. [ Denver S.  Aug 21, 2017 ]
A
it was recommended by crutchfield [ Eric  Jun 11, 2017 ]
SHOW MORESHOW LESS

2 questions already asked

Q
I have the metra 70-6512. I have connected all the wirest to aftermarket stereo wiring harness and have 4 yellows remaining. Instructions say they are for the tweeters. Where do I connect those to then? Do I need to cut any factory wiring and splice?
[ Griff  Sep 19, 2018 ]
1 answer
A
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.
[ Krissy  Sep 25, 2018 ]  Staff
Q
Do I run the harness to each speaker or to the back of the headunit?
[ Mike  Jun 17, 2017 ]
1 answer
A
You must connect the bare wires to your new radios harness, and then route the speaker portion of the bypass to the factory amp location behind the glovebox. The speaker connector will plug into the speaker output plug that you disconnect from the factory amp. This allows you to get full power to the speakers with the new receiver.
[ Jeff  Jun 20, 2017 ]  Staff

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