Expert Service 1-877-289-7664 [Hours]

Free eGift Card Promo

Metra 70-6512

Wiring Harness for 2002-2004 Dodge Ram with Infinity System

In Stock

List price $39.99

You Save: $20.00 (50.01%)


with warranty

Order within 32 hrs 38 mins to ship 12/26

Arrives by Friday, Jan. 2 to zip 07095

60-Day Money-Back

Hassle Free Returns

Low Price Guarantee

Seen it for less? Click here

365-Day Coverage

Warranty assistance for a year

In Stock

Arrives by Fri, Jan. 2

Get FAST answers from customers ASK a Question See questions answers

Metra Audio Store

Designed to be used for 2002-2004 Dodge Ram Trucks this harness is used to Bypass the Factory Infinity Sound System in vehicles without the Handsfree capable option. You will want to check your rear view mirror for an icon of a telephone. If this icon is not present the Metra 70-6512 is the harness for you.

Product Features:

  • 204" Long amplifier bypass harness
  • One 22-pin power plug, one 18-pin amplifier plug
  • Harness is plugged in at the factory amplifier and ran to the location of the aftermarket radio or the aftermarket amplifier
  • For 2002-2005 Dodge Ram (Infiniti System)
  • Check the Product Instructions to see basic instructions and compatibility list for the Metra 70-6512
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty


  • Yellow 12V Constant
  • Red 12V Accessory
  • Black - Ground
  • Orange Dash Light Dimmer/Illumination
  • Green Left Rear Speaker (+)
  • Green with Black Stripe Left Rear Speaker (-)
  • White Left Front Speaker (+)
  • White with Black Stripe Left Front Speaker (-)
  • Purple Right Rear Speaker (+)
  • Purple with Black Stripe Right Rear Speaker (-)
  • Gray Right Front Speaker (+)
  • Gray with Black Stripe Right Front Speaker (-)

Harness Features

Main Harness Function
Different installations on different vehicles require different harnesses. This type is what the harness is considered. Each wiring harness we sell serves a purpose such as installing an aftermarket car stereo, integrating an aftermarket amplifier with your factory car stereo, connecting Bluetooth to your factory car stereo, and more.
Install a Car Stereo & Bypass the Factory OEM Amplifier
Compatible Vehicle Make
Allows you to view only items that are compatible with your vehicle's make. Does not guarantee that it will work with your vehicle year or model.
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.
Dodge Ram

Premium Harness Features

Factory System Amplification
This refers to the factory sound system and whether the item is compatible with amplified or non-amplified systems.
Compatible Premium Audio Systems
Some vehicles have higher end audio systems installed in them by the manufacturer. This specifies which premium audio systems this item is compatible with.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Orrville, Oh

Good product if right for application--aftermarket radio AND amp.

June 7, 2012

I bought it to bypass factory amplifier and maintain factory head unit, but it is designed to be used with aftermarket head unit AND amplifier. The title is a little deceiving and the instructions are marginal so I will try to clarify them.

This harness will supply power and grounds only to the aftermarket head unit and provide connection (at the oe amp connector) to the factory speaker wires that go through the tight door jamb connectors. These leads are supposed to hook to your amp outputs.

The problem with this is the factory wiring to the speakers is very small (20 ga.) and isn't really suited to aftermarket speakers. I switched terminals to oe radio connector to allow speaker level outputs from oe head unit into aftermarket amp and ran bigger speaker wiring--big pain and need for wiring schematic and patience.

Would have been easier to cut wires but wanted to leave factory harness intact. Worked though and factory head unit powers aftermarket amp and speakers quite nicely. If used with aftermarket head unit and amp you will need RCA cables to go from head unit output to amp input in addition to this harness. You could also hook the speaker leads in this harness to your aftermarket head unit speaker outputs and power your speakers directly with the head unit and no amplifier.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Browse 1 question and 1 answer
Hide answersShow all answers | Sort by
How many watts can this harness handle?
A shopper on Oct 18, 2014
Best Answer: Hello,

Considering the wiring on this harness provides traditional 18-22g wiring, technically it is Optimum up to ~50w RMS Per Channel. Of which, is perfect for power from an Aftermarket headunit that will often Not exceed ~22w RMS Per Channel.
Reply · Report · Customer SStaff on Oct 18, 2014
· Add Answer · I Have This Question Too (0)

Product Summary


Model Number






Internal SKU


Internal Product ID


Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Metra 70-6512