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Metra 70-8117 Amp Bypass Harness

Connect a new car stereo and bypass the factory amplifier in select 2003-07 Toyota vehicles

Item # 120708117

Metra's 70-8117 harness allows you to bypass the factory amplifier in select 2003-07 Toyota models with the...

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Metra's 70-8117 harness allows you to bypass the factory amplifier in select 2003-07 Toyota models with the...

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About the Metra 70-8117 Amp Bypass Harness

Metra 70-8117 bypass harness

Metra's 70-8117 harness allows you to bypass the factory amplifier in select 2003-07 Toyota models with the upgraded sound system. So, you get the benefits of the high-power amplifier that's built into your new radio. Simply unplug the connections to the amplifier, plug in the bypass cable, and connect it to the in-dash receiver of your choice. The speaker wire section of this adapter is 17 feet long, which means you'll be able to access the remote amp locations that Toyota used in many of these vehicles.

Metra 70-8117 bypass harness

Metra's 70-8117 harness allows you to bypass the factory amplifier in select 2003-07 Toyota models with the upgraded sound system. So, you get the benefits of the high-power amplifier that's built into your new radio. Simply unplug the connections to the amplifier, plug in the bypass cable, and connect it to the in-dash receiver of your choice. The speaker wire section of this adapter is 17 feet long, which means you'll be able to access the remote amp locations that Toyota used in many of these vehicles.

Please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this adapter is compatible with your vehicle. Warranty: 60 days.

READ LESS

What's in the box:

  • 8" Power/ground harness
  • 17' Amp bypass harness
MFR #70-8117

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Metra 70-8117 Amp Bypass Harness reviews

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Good service but the part doesn't fit

Crutchfield customer from Gainesville, GA on 8/9/2019

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Does not fit. Happy with the overall service but this part just doesn't fit. Will have to take the stereo to a shop to have installed

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Cons:

Crutchfield response on

0 of 0 found this helpful

Metra 70-8117 Amp Bypass Harness

Crutchfield customer from Jacksonville, AR on 7/10/2019

2006 Toyota Sienna

Verified customer (What's this?)
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Great and very efficient got everything I expected for a great price definitely my to go place on car audio products I shop for from now on.

Pros: Sounds way better by passed just saying thank you guys.

Cons:

Crutchfield response on

0 of 0 found this helpful

Great if you will use it

Crutchfield customer from Huntingtn Sta, NY on 5/9/2019

Verified customer (What's this?)
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Works well if you need it, I agreed to quickly without thinking the install through, was replacing factory amp and running new speakers and wire anyway. Not reps fault mine.

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0 of 0 found this helpful

Metra 70-8117 Amp Bypass Harness

Crutchfield customer from Santa Fe, NM on 12/14/2018

2004 Toyota Sienna

Verified customer (What's this?)
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I love the Boss radio i got for my car. I was really impressed with the customer service i recived with my purchase. I will be using Crutchfield again!

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Crutchfield response on

0 of 0 found this helpful

Metra 70-8117 Amp Bypass Harness

Crutchfield customer from Bradenton, FL on 11/28/2018

2006 Toyota Tundra

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Easy enough

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Crutchfield response on

0 of 0 found this helpful

Metra 70-8117 Amp Bypass Harness

Crutchfield customer from Patterson, CA on 11/25/2018

2006 Toyota Tacoma

Verified customer (What's this?)
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was perfect made the install clean and easy

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Cons:

Crutchfield response on

0 of 0 found this helpful

By-Pass the Factory JBL Amp & Use Your Head Unit's Amp

Greg from Upstate, NY on 7/31/2018

2006 Toyota Tundra

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

Worked perfectly for my 06 Tundra Doublecab to bypass the OE JBL amp and drive all of the speakers from my Pioneer AVH-X3600BHS head unit. The instructions provided by Crutchfield were a 1000% better than the limited instructions included with the Metra paperwork. I ran the wiring from the JBL connector (located behind rear seat on driver's side) up to the head unit in the dash using the channel in the driver's side running boards and then behind the left kick panel. This is the same path used by the factory wiring harness and it is easily accessible from inside the truck. It's a very tight fit, but there is room if you only use the wires you need (this harness is used for a variety of Toyota applications, so there are several extra wires that you won't be using) and I would strongly recommend using a small diameter (3/8") plastic cable wrap to keep the bundle together and protect the wire insulation.

Pros: -Plugs directly into factory connector at JBL amp -Quality harness (good connector, heavy gauge wire) -Crutchfield's superior installation instructions

Cons: Getting wire bundle from rear of cab to dash is a bit tedious

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0 of 0 found this helpful

Metra 70-8117 Amp Bypass Harness

Crutchfield customer from Vancouver, WA on 5/21/2018

2007 Toyota Tacoma

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Good quality wires

Pros:

Cons:

Crutchfield response on

0 of 0 found this helpful

Metra 70-8117 Amp Bypass Harness

Crutchfield customer from Fresno, CA on 5/9/2018

2005 Toyota 4Runner

Verified customer (What's this?)
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Good quality and it is labeled

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0 of 0 found this helpful

Used in a Toyota Sienna

Keith from Hawaii on 3/12/2018

2006 Suzuki Grand Vitara

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

Great adapter to wire directly to your speakers! Only things lacking, and these could be big, is the dimmer control from the vehicle to the dimmer wire of the deck and "always hot" and "ground" power wires from the JBL harness. I moved some unused wires around to utilize this function. If you use this for an older Toyota Sienna, you can take out the old JBL amp and run the replacement amp from the power wire of the JBL system. But only if the new amp doesn't draw more than 30 amps. LOTS of wire to use (super long).

Pros: Great adapter setup

Cons: Illumination control wire would have been nice. The ability to use the power wires feeding the JBL amp also would have been nice.

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0 of 0 found this helpful

Excellent product and fast shipping

Richard from Saint Cloud, FL on 2/24/2018

2004 Toyota Tundra

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

It worked perfect. Instructions were good although I knew what to do!! Good quality and the right fit for my truck. Thank you

Pros: Perfect fit, fast ship, good quality

Cons: None

Crutchfield response on

1 of 1 found this helpful

Good Harness

Crutchfield customer from Clearwater, FL on 1/20/2018

2006 Toyota Tundra

Verified customer (What's this?)
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I installed this harness on a 2006 Toyota Tundra Double Cab and it works as advertised. There were a lot of extra wires for different applications, but those were easy enough to coil up and put out of the way. I would recommend this for anyone that has a stock JBL amp in their Toyota...the system sounds much better now.

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Cons:

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0 of 0 found this helpful

Metra 70-8117 Amp Bypass Harness

WILLIAM from Mayaguez, PR on 1/9/2018

2006 Toyota Tacoma

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Exactly fit,to my Tacoma 2006

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Cons:

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0 of 0 found this helpful

Metra 70-8117 Amp Bypass Harness

Crutchfield customer from Marietta, GA on 1/6/2018

2005 Toyota Sequoia

Verified customer (What's this?)
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2005 sequoia removed factory amp and put crossovers in its place under the center console going 4 ohm.

Pros:

Cons:

Crutchfield response on

0 of 0 found this helpful

Meh..

Chad from Castle Rock, CO on 12/5/2017

2006 Toyota Tacoma

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

I thought I bought a harness and head unit prepped for factory plug in. That was not the case, a wiring harness that did not fit anything factory. My unit turns on and off so power is right. Still no sound. Currently it is a large clock using dash space.

Pros: Lights up

Cons: Still no sound

Crutchfield response on 12/6/2017
Once we saw this review, our Tech Support team reached out to Chad to help him further. We'll either help him get the receiver connected and working properly, or help him return it for an exchange or refund. Lifetime tech support comes with every Crutchfield purchase.

0 of 0 found this helpful

Metra 70-8117 Amp Bypass Harness

Crutchfield customer from Bozeman, MT on 10/29/2017

2005 Toyota Sequoia

Verified customer (What's this?)
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Worked great! Much longer then needed but that's no problem. 2005 Sequoia with JBL - if you have front tweeters you'll need connect those wires with the appropriate front speaker wires. I had to call Crutchfield to figure this out.

Pros:

Cons:

Crutchfield response on

1 of 1 found this helpful

Metra 70-8117 Amp Bypass Harness

ESM from San Diego, CA on 10/22/2017

2005 Toyota 4Runner

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

The JBL amp in my 4runner had been acting up - losing the right side and occasionally shutting down altogether. It was suggested I use this bypass to remove the amp and power the speakers directly from the HU. Installation was a bit of a chore but straightforward. Had a few problems with the steering wheel controls but after fixing a connection had failed, SWC was restored. The bypass works fine, though the subwoofer no longer works as it was powered from the amp.

Pros: Solved the amp problem.

Cons: No subwoofer functionality.

Crutchfield response on

0 of 0 found this helpful

Metra 70-8117 Amp Bypass Harness

Crutchfield customer from Montana (MT) on 8/29/2017

2010 Dodge Ram 3500

Verified customer (What's this?)
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Worked fine overall. Connector quality was a little cheap. The radio power connector did not lock together. The amp bypass harness was great, though. Saved me a ton of time, instead of running new wire.

Pros:

Cons:

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0 of 0 found this helpful

Metra 70-8117 Amp Bypass Harness

Preston from Mckinney, TX on 8/27/2017

2004 Toyota 4Runner

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Easy to use.. No issues.

Pros:

Cons:

Crutchfield response on

1 of 1 found this helpful

Awsome

Brian from Florida on 4/26/2017

2004 Toyota Tundra

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

Worth it and helpful.

Pros: Quality, instructions, quality, quality, quality... Did I mention a quality item.

Cons: None.

Crutchfield response on

1 of 1 found this helpful

Made installation a breeze ??

Brandt from Payson, UT on 4/25/2017

2006 Toyota Tacoma

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

Worked great for my 08 Tundra Double Cab. I installed the Pioneer AVH-2800BS Double Din DVD player :)

Pros: None

Cons: None

Crutchfield response on

1 of 1 found this helpful

Works but lacks instructions

Joe from Wilmington, DE on 4/3/2017

2006 Toyota Tundra

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

The product works as advertised and provides more than enough wiring for my 06 Tundra Double Cab but the instructions are severely lacking. I had to youtube the fix for why my front speakers weren't working. Simple fix, but was annoying after spending the time to rewire everything.

Pros: it works

Cons: Instructions are lacking

Crutchfield response on

0 of 1 found this helpful

Easy install

Sergio from Houston, TX on 2/5/2017

2005 Toyota Sequoia

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Great harness Made install a breeze Just trim to fit Crutchfield rocks

Pros: Made extra long for many applications

Cons: None

Crutchfield response on

1 of 1 found this helpful

Metra 70-8117 Amp Bypass Harness

Nathan from Tennessee on 12/24/2016

2004 Toyota Tundra

Verified customer (What's this?)
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This product works as it should. 17 foot harness that might look intimidating, but it was very easy to route through my 04 tundra double cab

Pros:

Cons:

Crutchfield response on

1 of 1 found this helpful

Works

Doug from Seattle, WA on 11/19/2016

2005 Toyota Tundra

Verified customer (What's this?)
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Works as intended, But has way to many wires that I did not use.

Pros: It Works

Cons: Way to many extra wires

Crutchfield response on

0 of 1 found this helpful

Metra 70-8117 Amp Bypass Harness

Crutchfield customer from Boiling Springs, SC on 10/21/2016

2005 Toyota Tundra

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

Fit!! LOOOOOONG wires so you got 5 ft more then enough so your good to go. And for those that dont know why or how to bypass a factory amp, dont complain about doing it cause you may have to do some work for a change.

Pros: works

Cons:

Crutchfield response on

1 of 1 found this helpful

Factory Toyota Amp = EVIL

john from Sioux Falls, SD on 9/26/2016

2004 Toyota Sienna

Verified customer (What's this?)
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*2004 Toyota Sienna w/JBL.* So glad to finally solve the mysterious sound issues in my Gen 2 Toyota Sienna. The factory amp needed to be by-passed. I thought amps just amplified an input, but not this evil amp. It controlled the sound, monitoring it and decided where to allocate it. I got swirling sound (fader and balance) with variable "ghost" like EQ. With a new Sony head unit and some new speakers it was not allowing my system to function properly and HAD to go. This harness comes with yards of wire. I only needed enough to get from the head unit to the factory amp behind the glove box. The harness itself fit a little snugly, things are tight there under the amp in the glovebox anyway. I've noticed 2 Crutchfield harnesses lately that didn't seem to have an exact fit for me, but were close enough and ended up working OK. Wonderful improvement in sound and now I can tell my head unit actually has some clean power to it! I wish someone would've told me to bypass the stupid factory amp right from the start. I'm controlling the EQ and sound location now and able to use the remote app too! If you've got a Toyota factory amp, BY-PASS it!

Pros: easy to use. LOTS of wire.

Cons: lots of soldering

Crutchfield response on

0 of 0 found this helpful

Wrong products

Jeff from lynn haven, FL on 3/25/2016

2005 Toyota Sienna

Verified customer (What's this?)
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My fault I ordered the wrong wiring harnesses. Good news was Crutchfield immediately sent me the correct item with no fuss.

Pros: Great service from Crutchfield.

Cons: None.

Crutchfield response on

1 of 1 found this helpful

Be ready for some work

Crutchfield customer from Alabama on 12/29/2015

2005 Toyota Tundra

Verified customer (What's this?)
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I fully understand the desire to bypass the factory amp and use the one with a new head unit, but the work involved in my particular application simply was not worth it. My '05 Tundra amp is on the back wall of the truck cab which means running all those wires back up to the front of the truck and into the dash to connect to the new head unit. The harness comes with plenty of wire, so if you are ready to find a way to run an entire bundle back to the front of the vehicle, it probably works well. I returned mine for a different harness that allows me to use the factory amp and all worked out well. Many thanks to the folks at Crutchfield for helping me sort through all the issues and find a solution that worked!

Pros:

Cons:

Crutchfield response on

3 of 3 found this helpful

Amp Harnes

C. Walton from Texas on 12/29/2015

2006 Toyota Tundra

Verified customer (What's this?)
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The amp harness was very easy to install and was very happy with the final product

Pros: Everything was great

Cons: None

Crutchfield response on

1 of 1 found this helpful

Not worth the hastle

ChrisG from Anchorage, AK on 10/28/2014

2006 Toyota Tundra

Verified customer (What's this?)
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This is a fat stack of wires that looks like a string of lights from Clark W. Griswold. In the end i only ended up using this for the rear door speakers as I had to rewire the front speakers to avoid that BS wiring job Toyota gave the JBL system.

Pros: Plugs right in, no cutting the factory harness. 16 gauge wires.

Cons: To many wires in the bundle since it tries to apply to several vehicle configurations. Makes it hard to run under the carpet/door sills.

Crutchfield response on

3 of 3 found this helpful

Could be a lot easier

Frebo from Colorado Springs, CO on 8/18/2014

Verified customer (What's this?)
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Instructions were not great. But got it to work in the end

Pros: It finally worked

Cons: Wire color codes were not accurate for my vehicle. Had to call for instructions and they acted as though i should have known that i should have used the brown/green stripe instead of the Green/brown stripe. Definitely took some time figuring out

Crutchfield response on

2 of 2 found this helpful

Metra 70-8117 Amp Bypass Harness

Jason from Redding, CA on 12/31/2013

2005 Toyota Tundra

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

Excellent product. About 12' too long for use with my amps, but worked great. Does not come with the Toyota tundra JBL specific wiring diagram, but I was able to find one on a Toyota forum.

Pros: Ease of use

Cons: Lack of a complete wiring diagram.

Crutchfield response on

3 of 3 found this helpful

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Pros:

Cons:

Crutchfield response

<< >>

More details on the Metra 70-8117 Amp Bypass Harness

Stacey B.

Product Research

Features

Amp Bypass Harness: The Metra 70-8117 Power/Amp Bypass Harness consists of a 8" power/ground harness and 17' amp bypass harness. The 70-8117 is needed to bypass the factory amplifier in select 2003-2006 Toyota vehicles, when replacing the factory radio with an aftermarket head unit.

Note: Installation tools, hardware, & accessories are not included & sold separately. Please see the Accessories tab for recommendations & availability. If your vehicle is equipped with factory steering wheel controls, an additional adapter is required & sold separately.

Wire Code Chart:

Power/Ground Harness
Wire Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Black Chassis Ground
Blue Power Antenna

 

Amp Bypass Harness
Wire Color Function
*Brown/White Center Speaker (+), Sub Coil 1 (+), or Right Front Tweeter (+), or Note Used
*Dark Blue/Pink Center Speaker (-), Sub Coil (-), Right Front Tweeter (-), or Not Use
*Green/Orange Rear Twiddler Speaker (+), Sub Coil 2 (+), Left Front Tweeter (+), or Not Used
*Green/Red Rear Twiddler Speaker (-), Sub Coil 2 (-), Left Front Tweeter (-), or Not Used
*Green/White Sub Coil 1 (+), Left Front Door Woofer (+), Left Front Tweeter (+), Sub Coil 2 (+), or Not Used
*White/Red Sub Coil 1 (-), Left Front Door Woofer (-), Left Front Tweeter (-), Sub Coil 2 (-), or Not Used
*Yellow/Brown Sub Coil 2 (+), Right Front Door Woofer (+), Right Front Tweeter (+), Sub Coil 1 (+), or Not Used
*Brown/Blue Sub Coil 2 (-), Right Front Door Woofer (-), Right Front Tweeter (-), Sub Coil 1 (-), or Not Used
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 (-)
Purple Right Rear Speaker (+)
Purple/Black Right Rear Speaker (-)

*Wiring Note: The Brown/White, Dark Blue/Pink, Green/Orange, Green/Red, Green/White, White/Red, Yellow/Brown, and Brown/Blue wires of the amp bypass harness provide a variety of functions based on your type of vehicle. Check the Installation Instructions for your specific type of vehicle and function.

Factory Amp Locations:

  • 4Runner: Behind passenger rear quarter panel
  • Matrix/Prius: Under passenger front seat
  • Sequoia: Under center console
  • Sienna/Solara: Behind glove box
  • Tacoma: On back wall near passenger side
  • Tundra: On back wall near drivers' side

 

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
bypassing the factory amplifier [ Fred  Mar 15, 2019 ]
A
crutchfield always has you covered . automatic option for my components install since im bypassing factory amp and using a component amp. [ James  Feb 12, 2019 ]
A
it's for my vehicle and I believe from the symptoms of what my current aftermarket radio is doing, this should help [ David  Jan 13, 2019 ]
A
as suggested [ John  Aug 03, 2018 ]
A
easy connection with this harness. no headaches [ T  Jul 30, 2018 ]
A
after reading forums on toyotanation it is very possible my audio problems are a result of the factory jbl / toyota amplifier. i would like to have both harness options at the time of the install [ S  Dec 29, 2017 ]
A
I need it to wire my new stereo to the factory harness. It makes my job a lot easier to install. [ BRUNO  Dec 21, 2017 ]
A
The tundra limited has a factory JBL amplifier in it. You have to bypass it or your stereo and speakers will sound awful [ William  May 19, 2017 ]
A
Don't think I will need this but couldn't find a way to exclude it, for the price wasn't a big deal. [ Chris  Jan 22, 2017 ]
A
I have an aftermarket radio with time alignment processor installed, and I want to bypass the factory amp which is heavily degrading the sound with its own built-in processing, and install my older aftermarket amp instead. I will eventually be replacing the speakers as well, but for now this will allow me to connect my amp without making new cable runs to the individual speaker locations (the existing wiring is fine), and without permanently modifying the vehicle's existing wiring. [ David  Dec 19, 2016 ]
A
needed to bypass my oem amp so I could adjust my jvc stereo unfiltered. [ Kim  Nov 29, 2016 ]
A
maximize sound quality potantial [ Lisa  Nov 28, 2016 ]
A
Good deal [ Victor  Oct 14, 2016 ]
A
Recommended for the installation [ William  Mar 22, 2016 ]
A
Needed for the radio install [ Mark  Dec 26, 2015 ]
A
Because the factory jbl amp is substandard for running the speakers i replaced in my tundra [ mick  Dec 09, 2015 ]
SHOW MORESHOW LESS

4 questions already asked

Q
Does it work for a 2004 Prius with Nav and JbL?
[ Mark  Sep 13, 2017 ]
1 answer
A
For additional details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle.
[ Kenny  Sep 13, 2017 ]  Staff
Q
I assume the larger 20 pin connector plugs into the factory amp and then the wires are run up to the head unit where they are tied into the after market stereo wiring harness? Where does the smaller plug go? Does it plug into one of the factory plugs behind the head unit to bring power to the system?
[ Pete  Apr 20, 2015 ]
2 answers
A
Yes to both questions. This way you do not have to splice into the factory harness, just plug this harness into the factory harness and splice into the head unit. It worked perfect on my '03 4Runner with the JBL system. Good luck.
[ AVERY  Apr 22, 2015 ]
A
The 20 pin connector in this kit plugs into the harness that you unplug from the factory amplifier. This gives you access to the factory speaker wiring harness with out cutting off the factory 20 pin connector. (bypassing the amplifier) The smaller connector plugs into the factory radio wiring harness and is connected to your aftermarket head unit to provide constant and switched power and ground to it.
[ Matthew  Apr 21, 2015 ]

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