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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 | MFR # 70-1728C
$39.99 Earn up to 40 Rewards points
Our take on the Metra 70-1728 Amp Bypass Harness by Crutchfield's Zak Billmeier
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.
Note: Most vehicles will require additional installation parts please identify your vehicle if you haven’t done so. You can also call an Advisor for more information.
Metra 70-1728 Amp Bypass Harness Reviews
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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:
|Red||+12 Volt Accessory|
|Yellow||+12 Volt Constant|
|Yellow/Blue||Left Front Tweeter +|
|Yellow/Black||Left Front Tweeter -|
|Yellow/Red||Right Front Tweeter +|
|Yellow/Orange||Right Front Tweeter -|
|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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Why did you buy this?
my son does not use the steering wheel controls and does not need the extra expense of keeping them [ Timothy May 16, 2017 ]
Included in kit [ Gordon Mar 17, 2017 ]
Came with the accessories package. [ Michael Sep 22, 2016 ]
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 ]
3 questions already asked
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
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
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 ]
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 ]
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 ]