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Metra 70-1728 Amp Bypass Harness

Connect a new car stereo and bypass the factory amplifier in select 2006-up Honda vehicles

Item # 120701728

This Metra 70-1728 harness allows you to bypass the factory amplifier in select 2006-up Hondas with the...

Read more from Crutchfield writer, Zak B.

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$39.99

About the Metra 70-1728 Amp Bypass Harness

Metra 70-1728 Amp Bypass Harness

This Metra 70-1728 harness allows you to bypass the factory amplifier in select 2006-up Hondas with the factory-installed premium sound system. Simply unplug the connections to the amplifier, plug in the bypass cable, and connect it to the in-dash receiver of your choice. If you're not using a soldering iron, we recommend that you purchase some wire connectors to secure the connections. Check out our handy article on three ways to connect the wiring harness here.

Metra 70-1728 Amp Bypass Harness

This Metra 70-1728 harness allows you to bypass the factory amplifier in select 2006-up Hondas with the factory-installed premium sound system. Simply unplug the connections to the amplifier, plug in the bypass cable, and connect it to the in-dash receiver of your choice. If you're not using a soldering iron, we recommend that you purchase some wire connectors to secure the connections. Check out our handy article on three ways to connect the wiring harness here.

If you haven't done so already, please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this item is compatible with your vehicle. Warranty: 60 days.

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What's in the box:

  • 8" Power harness
  • 17' Speaker harness

Customer reviews

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Metra 70-1728 Amp Bypass Harness Reviews

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More details on the Metra 70-1728 Amp Bypass Harness

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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:

(Power Harness)

Wire Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Black Ground
Orange/White Dimmer

(Speaker Harness)

Wire Color Function
Yellow/Blue Left Front Tweeter +
Yellow/Black Left Front Tweeter -
Yellow/Red Right Front Tweeter +
Yellow/Orange Right Front Tweeter -
Green/White Subwoofer +
White/Red Subwoofer -
White Left Front Speaker +
White/Black Left Front Speaker -
Gray Right Front Speaker +
Gray/Black Right Front Speaker -
Green Left Rear Speaker +
Green/Black Left Rear Speaker -
Violet Right Rear Speaker +
Violet/Black Right Rear Speaker -

Harness Location: The factory plug that mates with the Power Harness is located in the factory radio cavity of the vehicle. The factory plug that mates with the Speaker Harness (used to bypass factory amp) is located at the external factory amp location (below the radio, behind the console). The 17' Speaker Harness will need to be plugged into the external factory amp and then run up to your in-dash aftermarket head unit for speaker wire connection.

Note: An additional aftermarket amplifier is recommended if your vehicle is equipped with Front Tweeters, Front Speakers, Rear Speakers, & Factory Subwoofer.

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
need to bypass factory amp [ angel  Oct 22, 2018 ]
A
Didn't need this since replacing a bad aftermarket deck and already has a aftermarket harness which will use the factory amp. This just came as a package to the installation kit for the civic si sedan. All i needed was the dash kit and was cheaper to purchase a s whole kit. [ Waylon  Aug 24, 2018 ]
A
Reviews [ AVELINO  Jun 27, 2018 ]
A
I decided to save some money by bypassing my steering wheel audio controls and factory amp/sub. I'll see how the new system sounds with my factory speakers and may get an amp in the future. [ julian  Mar 27, 2018 ]
A
I didn't want to hardwire the factory one. [ Vladimir  Aug 25, 2017 ]
A
my son does not use the steering wheel controls and does not need the extra expense of keeping them [ Timothy  May 16, 2017 ]
A
Included in kit [ Gordon  Mar 17, 2017 ]
A
Came with the accessories package. [ Michael  Sep 22, 2016 ]
A
Needed to replace to your factory harness on an 8th gen civic, also the wires are way long so you will have to cut to desirable length. [ Michael  Sep 13, 2016 ]
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4 questions already asked

Q
If I am using an aftermarket amplifier to power all speakers and do not want to use stock speaker wires can I completely ignore the bypass harness and just connect the power harness?
[ Thomas  Feb 01, 2018 ]
1 answer
A
Not sure if I understand you but if u don't want to use the factory speaker wires are you going to run new wires from your door speakers that seems like a lot of work ? But if u do that then yes u don't have to use the supplied speaker wires with the kit
[ matthew  Feb 02, 2018 ]
Q
Does this harness fit a 2008 Honda Civic Si with navigation?
[ Malachi  Apr 11, 2017 ]
1 answer
A
It looks like this Metra 70-1728 Amp Bypass Harness would be compatible with the '08 Civic SI (w/ navigation). You can also verify that online by using our Outfit My Car tool: http://www.crutchfield.com/car/carselector.aspx For additional details on installation and/or fitment please contact an Advisor by phone (1-800-324-9695) or online chat. Hope that helps!
[ Larry  Apr 17, 2017 ]  Staff
Q
With the bypass harness, do i just splice into the factory amp harness and leave it plugged into the factory amp or splice into the factory amp harness and leave it unplugged from the factory amp? Never done this before, very confused?
[ eddie  Mar 21, 2016 ]
1 answer
A
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the connections on the product. 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. You can also post your question in our forums: http://community.crutchfield.com. Or try our online support center: http://crutchfield.custhelp.com/app/answers/list/kw/.
[ Kenny  Mar 21, 2016 ]  Staff
Q
where is the external amp on a 2008 honda civic coupe dx? the instructions said it was in the shifter console but the info I'm getting from the Crutchfield website says it's in the back of the car.
[ Zane  Jul 26, 2014 ]
3 answers
A
In my 06 EX it is in the center console, but I believe there are some models that it is under the driver's seat I believe.
[ ERIC  Sep 12, 2014 ]
A
I remember getting that big bundle of wire that is pictured here, and I still have most of it. I dont recall having to go all the way to the trunk, and we did pop the console. I was wondering my self why there was so much wire with this adapter. Having to only go to the console gave us all that excess. By the way, my son's Civic is an '06 EX. Hope this was some help.
[ RICHARD  Jul 26, 2014 ]
A
I know in a 2008 Civic Si, the amp is in front of the shifter console below the dash. I don't know about a DX but I would think it's in the same place.
[ THEODORE  Jul 26, 2014 ]

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