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Metra 70-6512

Wiring Harness for 2002-2004 Dodge Ram 1500, Ram 3500, Ram 2500 with Infinity System

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• Wiring Harness For 2002-2004 Dodge Ram With Infinity System
• 204" Long Amplifier Bypass Harness
• 22-Pin Power Plug, 18-Pin Amplifier Plug

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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:


  • 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 (-)

Compatible Vehicles

Please use our Fitment Guide to determine specific compatibility for the submodel and audio features

  • 2002 Dodge Ram 1500
  • 2003 Dodge Ram 1500
  • 2003 Dodge Ram 2500
  • 2003 Dodge Ram 3500
  • 2004 Dodge Ram 1500

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Like this product

It made everything a lot easier and it went a lot faster did not cost that much I would recommend

By Mike on April 1, 2016


found this helpful.

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

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.

By Matt on June 7, 2012


found this helpful.

By Romell on October 8, 2023 Checkmark Icon Verified purchase


found this helpful.

By Malcolm on August 26, 2023 Checkmark Icon Verified purchase


found this helpful.

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  • Vehicle’s insurance card
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  • Vehicle produced after 2005: Inside driver’s side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
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