2021 Wiring Harness

Joe-Runner

Joe-Runner

New member
Hello,

I am looking for a wiring harness for the 2021 radio. I want to add an inline amp without cutting into the factory wires. I did this in my 2017 with the trusty old 6 and 10 pin connectors Toyota has used for many years, but unfortunately the 2021 does not have the same wiring harness.

Here's the old harness I'm talking about: Amazon.com: MOTONG Stereo Wire Harness for 1987-Up Toyota Power/4 Speaker Connector: Car Electronics
And here's the amp: Amazon.com: Alpine KTP-445U 4-channel Power Pack Amplifier

This allows you to wire everything together outside the vehicle, then just plug it in between the old harnesses (thus, inline).

I've already reached out to Crutchfield with no luck. Anyone on here know of a wiring harness available for the new truck currently?

Thanks!
 
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As far as I’m aware there’s not even a harness for the 2020 radio. I doubt there is one for the 2021. If you try to buy a radio on Crutchfield for a 2020 it’ll say it’s not recommended because there isn’t a harness yet.


Sent from my iPhone using Tapatalk
 
Javin028 said:
I believe this should work:

Amazon.com: Add An Amp Amplifier Adapter Interface to Factory OEM Car Stereo Radio System for select 2018+ Toyota Vehicles- Add Subwoofer Bass Amp etc.- No Factory Premium Amp- Vehicles listed below: Everything Else

I accidentally bought the older version for a 2021 Rav4 that didn't work, but this version did. Also works the Tacoma guys:

2020 tacoma sr5 non jbl wiring diagram | Page 2 | Tacoma World
Click to expand...

Those look very similar! It's hard to say if it'll work for my truck. Can't find any stories of someone mentioning specifically if they worked for the 4Runner.
 
Joe-Runner said:
Yup, already checked TacoTunes, nothing (specifically listed) for my 4Runner. And that other site has stuff for older Toyotas, but I don't see anything for 2020+
Click to expand...

Reach out to TacoTunes, many of the harnesses are compatible with other years. They will know or can point you in the right direction.
 
YES! This is the response I was hoping for! :rockon:

Description says it has power, remote, and all speakers, but the image doesn't show the corresponding colors it lists.
-Did you have to run your own remote wire separate from this harness?
-Do you have any wiring diagrams for the truck you can share?

This harness should make it a much easier job. Thanks! :banana:
 
The 2020+ 4runners have all the speaker wires on a single connector with nothing else on it. this makes it easy.

The tacotunes harness has standard car audio colors on their side of the connectors that lined up with my amp harness colors. super easy. I spent time before getting the harness mapping the colors over but it was totally unnecessary.


This is not like previous years where your T harness had items other than the audio signals that had to be connected across the harness.

I did not use a remote turn on wire - used the sensing option on the amp and it works perfect
 
motopsycha said:
The 2020+ 4runners have all the speaker wires on a single connector with nothing else on it. this makes it easy.

I did not use a remote turn on wire - used the sensing option on the amp and it works perfect
Click to expand...

Thanks for the response man. I just got off the email with a rep from TacoTunes. He didn't answer me directly as to whether or not the Camry's connector works with my truck but he recommended this slightly different looking one that costs more.

TacoTunes Link: 4Runner Plug & Play Amp Harness Installation Kit - Taco Tunes - Toyota Audio Solutions

Really wish they would clean up their site; It's a bit of a pain to navigate. I don't understand how I didn't see this previously!

How did you run power for your amp? Tap it into a fuse? Straight to the battery? Power provided through the harness?
 
I did my install on a 2020.

I think Taco tunes amp plug and play harness includes wiring to run to an under seat mounted amp. I wanted to use speed wire for a cleaner install so I got the sub harness and cut off the connectors to make my own harness. For me purchasing the cheaper harness was the way to go because I wasn’t using the full length wires

I ran a dedicated power line from the battery.

I mounted my amp under the passenger seat. Power was pulled through the firewall and under the sill plate on the passenger side. The audio harness passed through the console. It made for a clean install
 
Last edited:
UPDATE on my situation.

Ended up ordering this harness from TacoTunes: 4Runner Plug & Play Amp Harness Installation Kit - Taco Tunes - Toyota Audio Solutions

It allows your to tap into the stereo output, route it to an amp/sub input, and then send the return line back to plug into the speaker input connector. It's a beautiful thing, really. Very high quality and well done harness, and to top it off it's already got connectors on it to plug directly into their amplifiers! So, they got me, I went ahead and ordered the 4 channel amp and install kit from Tacotunes as well.
Amp: TXD3204v3 Plug & Play 4 channel x 100 watts RMS Class D Amplifier - Taco Tunes - Toyota Audio Solutions

Unfortunately they cut their staff due to Covid regulations, or something like that.... so I've been waiting TEN DAYS and it still hasn't shipped :sobbing:

Excited for it to arrive so I can damage my hearing some more :rockon:
 
Got it all installed. Works and sounds AWESOME!

Pricey but quality. I appreciate their YouTube playlist showing the install and their customer service. I ordered an 8 Guage amp install kit but they sent me a 4, which is better and twice the price, so I cant complain. Their website sucks, and shipping was ridiculously slow (Covid to blame) but overall really good experience with these guys.

Thanks everyone for coming in with advice. Really appreciate it!
d43f1d68816866eaf9c9c2dbbd151ed4.jpg
 
Thanks!

I just got a 2022 SR5 Premium and want to add a sub like I did in my 2017 ORP. I used the wiring harnesses you linked in your first post in the 2017. Before taking out the stereo in the 2022, I came here and found your post. Exactly what I was looking for and saved me a ton of time. Thanks!

If I follow everything in this thread correctly, it looks like the TacoTunes 4Runner Plug & Play Amp Harness Installation Kit has the wiring harness and reverse wiring harness that is compatible with the 2021 (and hopefully the 2022) stereo. Basically, the process is the same as what I did with the 2017 stereo, just a different set of wiring harnesses. Is that correct?


Joe-Runner said:
Got it all installed. Works and sounds AWESOME!

Pricey but quality. I appreciate their YouTube playlist showing the install and their customer service. I ordered an 8 Guage amp install kit but they sent me a 4, which is better and twice the price, so I cant complain. Their website sucks, and shipping was ridiculously slow (Covid to blame) but overall really good experience with these guys.

Thanks everyone for coming in with advice. Really appreciate it!
d43f1d68816866eaf9c9c2dbbd151ed4.jpg
Click to expand...
 
GearJunkie88 said:
I just got a 2022 SR5 Premium and want to add a sub like I did in my 2017 ORP. I used the wiring harnesses you linked in your first post in the 2017. Before taking out the stereo in the 2022, I came here and found your post. Exactly what I was looking for and saved me a ton of time. Thanks!



If I follow everything in this thread correctly, it looks like the TacoTunes 4Runner Plug & Play Amp Harness Installation Kit has the wiring harness and reverse wiring harness that is compatible with the 2021 (and hopefully the 2022) stereo. Basically, the process is the same as what I did with the 2017 stereo, just a different set of wiring harnesses. Is that correct?
Click to expand...
Glad my post saved you some time! That's why I came back with the follow-up, figured there will be plenty of people with the same question soon enough.

And yeah, the amp really just plugs in line between the head unit and the speakers. It's a whole lot of wire that I had to stash behind the dash and under the carpet, but I ran it down to the amp, and back from the amp to the speakers. The sound is absolutely amazing! Good luck with your install!
 
Joe-Runner said:
UPDATE on my situation.

Ended up ordering this harness from TacoTunes: 4Runner Plug & Play Amp Harness Installation Kit - Taco Tunes - Toyota Audio Solutions

It allows your to tap into the stereo output, route it to an amp/sub input, and then send the return line back to plug into the speaker input connector. It's a beautiful thing, really. Very high quality and well done harness, and to top it off it's already got connectors on it to plug directly into their amplifiers! So, they got me, I went ahead and ordered the 4 channel amp and install kit from Tacotunes as well.
Amp: TXD3204v3 Plug & Play 4 channel x 100 watts RMS Class D Amplifier - Taco Tunes - Toyota Audio Solutions

Unfortunately they cut their staff due to Covid regulations, or something like that.... so I've been waiting TEN DAYS and it still hasn't shipped :sobbing:

Excited for it to arrive so I can damage my hearing some more :rockon:
Click to expand...


how do you like the amp, install simple? I'm looking to use it with a 2017 4runner and sony 8100 head unit. I found a used one at a good price, how do I go about connecting the speakers to it though. Only looking to do the front and rear doors.
 
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