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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

Save with a compatible car stereo with a compatible car stereo
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  • Metra 70-8117 Amp Bypass Harness

    Adapter package

  • Metra 70-8117 Amp Bypass Harness

 

Our take on the Metra 70-8117 Amp Bypass Harness

by Dave Delamere

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.

See more info on this item

Note: Most vehicles will require additional installation parts — please identify your vehicle if you haven’t done so, then check here for a list of parts. You can also call an Advisor for more information.

Hands-on research from the Crutchfield Labs (what are the Labs?)

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What's in the box?

Download owner's manual

  • 8" Power/ground harness
  • 17' Amp bypass harness

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

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. Please visit the Crutchfield Car Selector for vehicle compatibility.

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
*Brown/Yellow 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, Brown/Yellow, 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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Metra 70-8117 Amp Bypass Harness Reviews

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3 out of 5

Could be a lot easier

Written By Frebo, Colorado Springs, CO on Monday, August 18, 2014
Crutchfield Customer Review (What's this?)
 
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
Was this review helpful?    Yes | No
 
4 out of 5

Metra 70-8117 Amp Bypass Harness

Written By Jason, Redding, CA on Tuesday, December 31, 2013
Crutchfield Customer Review (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.
1 out of 1 people found this helpful
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For a more in-depth review and enhanced detailed information on the Metra 70-8117 Amp Bypass Harness, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_120708117/Metra-70-8117-Amp-Bypass-Harness.html ).

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