Wiring diagram!

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Thanks for the post and these replies. I’m looking to install a subwoofer/amp using a line output converter. Ideally, I’d like to find a T harness specific to the factory head unit, but if not, will need the wiring diagram. Where are you getting this information and does it include actual diagrams?
 
If you need alldata I can get you pictures on tues when I’m back at work


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Crawlingjunk thx Is this the same for 2021 4R Venture with Premium Audio 8 speakers (Non JBL) head unit? looking to T harness to DSP and amp.

What do you know about speaker output? is it Eq'ed or trimmed in the head? Bass roll off? any fake engine noise? # of channels? Watts/channel out?

THX! Happy new year
 
In a related question:

Would this Camry harness from Tacotunes work to create a t harness for hooking up an amp to a 20-21 nonJBL 4runner?

2018+ Toyota Camry Add A Subwoofer Harness - PLUG n PLAY - Taco Tunes - Toyota Audio Solutions

I'm looking to wire up a Kicker key amp like the OP and not seeing any harness options. This one looks to have the male and female black 10 pin connectors the headunit uses for speaker outputs


Wondering the same! This is what I was given for my 21 T4R. Reeeeeally don't want to tap the factory wires.
 

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I just did this today. Was going to make a full post but i guess I’m not allowed to do that yet. Have to make more replies first. Anyways i used a line converter and tied into the right rear door speaker wires. Have my amp under the passenger seat. Had to pull off the front and back door foot guard things with a plastic pry bar. Then the panel piece under the seat belt. For my 2020 off read premium the wires were red and white. I just used a razor blade and was careful to only take off the wires outside. Just wrapped the other speaker wire around and electric taped it. I can send you some pics of the process if you like.
 
I just did this today. Was going to make a full post but i guess I’m not allowed to do that yet. Have to make more replies first. Anyways i used a line converter and tied into the right rear door speaker wires. Have my amp under the passenger seat. Had to pull off the front and back door foot guard things with a plastic pry bar. Then the panel piece under the seat belt. For my 2020 off read premium the wires were red and white. I just used a razor blade and was careful to only take off the wires outside. Just wrapped the other speaker wire around and electric taped it. I can send you some pics of the process if you like.


Photos would be great. Did you pull out the head unit and tap from inside the dash?
 
I just did this today. Was going to make a full post but i guess I’m not allowed to do that yet. Have to make more replies first. Anyways i used a line converter and tied into the right rear door speaker wires. Have my amp under the passenger seat. Had to pull off the front and back door foot guard things with a plastic pry bar. Then the panel piece under the seat belt. For my 2020 off read premium the wires were red and white. I just used a razor blade and was careful to only take off the wires outside. Just wrapped the other speaker wire around and electric taped it. I can send you some pics of the process if you like.

Are you saying you just scraped off the installation and wrapped your tapped wire around it and electrical taped the connection? That's not going to end well. You need a proper connection.
 
Yep. That’s what i did in my last car and never had a problem for 3 years. Then pulled everything out to transfer to this vehicle.
 
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Photos would be great. Did you pull out the head unit and tap from inside the dash?

Here is the wire harness that is accessible for the rear door right speaker, behind the seat belt column. Grounded to the seat belt “roller” at the bottom. Easiest place to sand by the seat.
 

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Here is the wire harness that is accessible for the rear door right speaker, behind the seat belt column. Grounded to the seat belt “roller” at the bottom. Easiest place to sand by the seat.

So, does that mean you only tapped one right speaker? I suppose that's all that's needed for a mono amp. I have to say that I would second the suggestion to solder or at least crimp the connection.

For what it's worth, I've spoken to Daniel with Tacotunes about a harness that will tap the speaker level outputs and he assures me that the below harness will work. So, I've ordered one to give it a try.

Toyota 4Runner Plug and Play add a subwoofer harness - Taco Tunes - Toyota Audio Solutions
 
2020-up 4Runner w/o JBL radio 86140-35340 Panasonic, wiring colors

Wondering the same! This is what I was given for my 21 T4R. Reeeeeally don't want to tap the factory wires.

Would you happen to have the rest of that picture of this connectors schedule ?
Tks.
That will help me a lot decifering all the dirt on the web
 

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