Metra TYTO-01 JBL Amplifier Interface Harness, BLACK

I was pulling my hair out trying to replace the factory head unit in my 2003 Toyota 4Runner that came with the factory JBL audio system (amp and sub in trunk). I was minutes away from just driving my truck off a cliff out of frustration with how many different poorly documented factory wiring options there were for one freaking make/model of car. This was my 4th wiring harness I purchased and the only one that worked. It works perfect. Please note however the product does not match the picture in the description. There are no RCA cables at all, and the black box is a different shape see the attached picture. However, it seems to work fine by hooking up the eight wire leads instead of four RCA's. I will explain what was wrong with the other three harnesses, as I figure people with the same vehicle as me may be running into the same issues and this is the answer. 1st attempt - Metra 70-1761 - This is the standard Toyota 87+ wire harness, however if you have a JBL factory headunit these wires will not fit. This is for non JBL headunits, that only have 4 door speakers. I had to remove 6 panels and take my dash half apart to get to see these factory wires. 2nd attempt - Metra 70-8113 - Fit one of the three factory JBL harnesses, and the new head unit powered on, however no sound. Found out part of my factory JBL system was an amp in the trunk that powers 10 speakers. This harness didn't provide the necessary data signal to the amp to turn it on, so there was no sound. The blue "amp on" wire did not work. 3rd attempt - Metra 70-8117 Amp Bypass Harness - Decided the bypass the amp and center/tweeters all together and just hook up the 4 door speakers with this bypass harness. It did not fit the factory harnesses, and with some extensive googling for wiring guides i found out the specific model factory headunit i had (JBL 56827) has three plugs on it, however none of these 40 some wires work for bypassing. They are all for audio-in expansions and steering control and other stuff. This is about where I lost it. 4th attempt - This - It doesn't look at all like the picture. There are no RCA connections as pictured, and the black box is completely different. My new headunit had RCA connections which made me think this was not going to work. I figured it was worth a shot though so I wired it up to the 8 F/R L/R speaker leads. IT WORKED! It was sounding a bit distorted so I tweaked the attenuator knob and now it sounds incredible and clear. There is about a 5 sec delay from turning my truck on and off till you hear any sound, however it seems to work consistently. There is no steering volume/track control for a JBL 56827, those wires are on a different harness slot that wasn't part of this package. This is the most expensive solution of the four I tried, but it is the only one that actually worked, and the results sound great and functions perfectly. I lost steering wheel volume control, but it sounds like for another $50 you can get a universal steering wheel control adapter. However I'm pretty much over this project, and I'm fine with turning the volume knob by hand. It is so much better having a modern headunit in place of the crappy JBL factory unit, the audio sounds much cleaner and more full despite not doing anything to the factory speakers yet.

Used this on a head unit install for a 04 prius. Everything works and the sound is nice, given that its a 20+ year old car.

I have a 2006 Toyota Rav4 with a JBL amplified system. I replaced the original radio and needed a harness for it. It was very frustrating trying to find one. After buying several and not getting them to work, I found this one. It's really worth it. The connection is quite easy, and everything works wonderfully. I highly recommend it, and for the price, it's worth it.

Took a lot of time to get it all wired together but instructions were straightforward. You must also look at your stereos wiring and make sure they correspond to each other. overall it works with factory JBL speakers system and sounds great. Price is a bit too steep in my opinion but if you are interested in aftermarket stereo this is works.

So, finally I found a harness that cost more than the cheap options, but I simplly follow the wiring instruction and the radio powers us just as all of the other harnesses did, but now there is actually sound playing out of all 4 speakers of the JBL amplified system with a nice sound. I have tried a few options to put an inexpensive Android radio option into a 2005 Toyota Tundra with the JBL amplified system and no other harness with thise RCA cables attached would have sound playing and it was frustration. I bought this AXXESS TYTO-01 used at just under $70, because I was not sure it would work like the others and might have to return, but it worked and now I am happy. I wasted so much time ordering cheaper ones, waiting for them to come, radio is in and out of the truck each time. Just get this and save yourself time. It is well worth it.

Encountered a persistent intermittent sound issue in my 2003 4Runner with JBL Synthesis system - front speakers would immediately cut out and then pop back on after several minutes (sometimes 20 or more). Sometimes they would cut out again. I meticulously re-did all of the connections and opened and inspected the circuit board for bad connections. After several tries over 6 months, it is still has intermittent issues. All told, I spent many hours over several months trying to make this item work. Thankfully, the 4Runner dash is easy to disassemble - I did it so many times, I could probably do it blindfolded. After working flawlessly for about two weeks, the front speakers now cut out again if you try to use the head unit when you first turn the car on. After some time, it tends to stabilize. It appears to be the adapter that is cutting off the sound to the front speakers for an unknown reason. If I turn the head unit off and then turn it back on, the sound returns to the front briefly only to cut off again. Eventually, it comes back to the front, typically once I start driving at highway speed for several minutes. It is beyond an annoyance, it sucks. This is an old car that is not a daily driver so it is something I am willing to live with for now. Disappointed in this product, though.

Used it to install a double DIN aftermarket radio into my 2003 Lexus ES300, retaining the non Mark Levinson factory amplifier. Everything works fine except fade control does not work, this is a known problem with this adapter. Some people have been able to achieve a particular Fade front to back ratio by setting the fade on their factory radio before uninstalling it. The fade setting is retained in the factory Amp, at least until power loss from a dead battery. One other caveat I found which is not mentioned anywhere in the manual or on the internet are the two ground wires. One is system ground which is required, the other black ground wire is for the polarity of the illumination circuit. If your radio needs 12v+ for illumination or backlight, then connect both grounds to chassis ground. If your radio needs a (-) negative trigger for illumination, then simply leave this ground capped/taped/heat shrunk etc, not connected to anything.

Sirve para activar el amplificador original Toyota Jbl

great product easy to install, bought ir for 2002 lexus es300, works perfectly with my android stereo

Made a massive difference from a self made harness to this. Very happy with this product and can confirm it works on a Land cruiser 100 series with the AMP sound system

va perfecto se oye el radio cd estupendamente recomiendo la compra

Siguiendo instrucciones funcionó bien y a la primera.