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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...

Find what Fits your car

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

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Item # 120708117

In stock
$44.99

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.

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What's in the box:

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

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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

5 questions already asked

Q
when using the the Metra 70-8117 Amp Bypass Harness, is my factory amp still powering the audio system?
[ Christian  Mar 22, 2020 ]
1 answer
A
No, when you use that harness the new aftermarket radio will be powering the audio system.
[ Cosmo  Apr 20, 2020 ]  Staff
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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