Putting 2021 Power seat into a 2017

One more question since you're pretty knowledgeable, here is my fuse panel..I dont see the 30a locations of where to tap. Am I missing something? Sorry if it's obvious im still learning this.

 

It wouldn't be a tap. Find the connector 1H. It's on the cab side top of same fuse panel you are showing.

The 30A fuse is on the side of the fuse panel, not where all the main fuses are.

 

1H:

Bottom BLACK wire opposite of the purple thin one

 

Looks like I have a green wire there.
That is the only location i can use?
really appreciate you taking your time to respond to my questions. Very helpful indeed.

 

"Seems" is not same as verified...

 

Just confirmed, that space you mentioned is available. One last question..what type of pin do I purchased to add to that harness? Is it a molex? Really appreciate your help..

 

That I haven't found out...yet. Just another thing you'll need to confirm. With a DMM, verify continuity from missing wire pin to missing fuse pin.

P.S. Careful one pin where fuse goes is always hot (battery).

 

Had a quick question, do you happen to know what these extra plugs are for? They're just sitting there in my dash..one of the plugs has a switched power source.
Also a white plug with a single green wire right in the middle of the plug

 

If anyone is willing to help or share photos of how you connected your wiring, I would be extremely grateful. I just grabbed a full set of 2022 leather seats with a power driver and I would like to install in my 2017 TRD Off-Road Premium.

I've looked at the photos of diagrams here, but admittedly, I would love to see how people actually connected it to the truck and what you did to the seat plug. Is it really only one wire for power and one for ground? Which wire on the 6 pin seat plug? Also, do y'all have a picture of how you connected to IE-5 1 and 2? I am struggling and willing to admit it lol. Would be thankful if anyone can show me how you made it work in your 3rd gen, please share!

 

I’d appreciate a walkthrough for dummies myself. I’ve yet to get a powered seat, but call the local junk yard weekly in hopes of snagging one with an air bag that hasn’t popped

 

I'll snap some photos once i get off work. Overall, the plugs are all the same between the Manual seats and the new powered seats.

the powered seat has a harness, that expands out to the same connectors that the manual seats us. if you disconnect those from the main power harness (as its a 1 cable solution) then you have the same 2-3 connections you would make with the manual seats.

seat pressure is the same, airbag is the same. the "power" wire connector that i brought into the cab from the battery has 2 wires (1 ground, one positive).


Again, i'll snap a photo of the seat after work

 

This is awesome! Thank you so much! Would you mind showing which connector you grabbed power from in the cab? I couldn't find markings very easily on the plugs in my cab under the dash and I'd really love to not set my truck on fire.
The one thing I will say that is the BA3 plug on my manual seat and these new electric seats look to both have 6 wires, which is strange. I was planning to connect them and then just splice behind the plug on the seat harness on the black wire to a fused power source and the white/stripe directly to a ground.

 

the connector i had used to provide power to the seat is the OEM one. Mind you, i ripped my seat out of a wrecked truck that was destined to the scrap yard... so it wasn't ever going to need the harness....

but yeah, you could probably get away with making yourself a harness using "marine grade" quick connectors from amazoom, since you only need power and ground. its been a while so i dont recall 100% how it's wired off the top of my head.

 

Any pictures you'd be willing to share would be incredible. I have all the diagrams and pictures from other folks, but it's just literally seeing how someone did it that I'm missing. I also plan to make a full master write up for everyone after this that will show the diagrams and then the actual pictures and connections.

 

Alright, so best i can get without needing to remove the seat out of its place.
NOTE: Colours below is just me scribbling on images, the harnesses are not actually those colours.

• Red marked wires are the OEM Wireharness by Toyota, this is built into the Manual-seat trucks. is expanded on with Yellow, Blue, and Pink harness connectors.

• Yellow, is your Airbag (duh). this wire and connector is shared between the manual and power seat trucks.

• Blue, dont recall, i think its seat occupancy.

• Pink iirc is seat heat connector.

​

• Circled in Red is the seat heater connector. Thank you Toyota for being Lazy and having this harness with the correct connector already looped into itseld. you need to disconnect this cable from the seat harness that exists. you can bypass the new wire harness diagram (below) and simplify things this way.

• Green Marked harness that was made for the control settings/ directions for the seat (See pinout sheet below, highlighted in Orange.) this wire controls seat movement functions.

More old photos that wernt posted


Pinout guide, IIRC the harness i had had different output colours compared to the input. So take with a goood old teaspoon of salt.


You can Bypass all the seat-heater pinouts as you will disconnect the seat-heater (circled red) and if you have the full harness for the powered seat, you just need to cut off the Pink/Green (above) powered seat connector and follow the above pinout for Pins #5 and #1 (highlighted in orange).
#5 is positive.
#1 is negative.

This is the same findings at this post below:

providing these connections allow for the seat power functions to work.

this is how its connected under the seat


yes, there is no shutoff/ engine off connection or switch and this seat is powered 24/7.

"red" line is connected to Pin #1 on the Male connector, the White+Black wire
"White" line is connected to Pin #5 on the male connector, the Black+Black wire

Edit: attaching this, as i call out the connector names in case someone gets confused from earlier schematics.

 

Now actually reading this:

I Think IE-5 Is the red circled harness connector.

BA3 is new auto-seat harness.
IE5 is the connector that you can disconnect and connect into the manual harness.

the BA3 to IE5 connection actuallys loops backwards at the control board or something and from there, loops around the seat. You can skip power to IE5 via BA3 and just connect IE5 directly to the existing truck harness that uses the same connector.

 

I. Fucking. Love. You.


Absolute legend. THANK YOU SO MUCH!!!!!!
This is perfect!! Thank you!

 

I'm still amazed the seat was intact at all when we found it

Later found out the truck hit a moose and rolled down a embankment. Driver survived.

 

Wow! That is insane actually!! I was able to score a set of nearly new full leather seats with electric driver from a 2022 for $550 last night, so I couldn’t not do it. I didn’t ask questions about it where the guy got them and I think that’s probably for the best, but he was nice!

glad the seat worked out with you! When you connected your existing IE5 to the BA3 on the seat, did you have the same amount of wires? I was going to see if I could move the pins around to match and see if it still works. The seat and my truck have the same wires, so very curious. If it doesn’t work, I was going to still plug in IE5 to BA3 and then connect a new wire directly to the power wire that goes into BA3 and run that with a fuse to power. I actually decided to get crafty and I ordered an auxiliary LED off-road light harness that comes with a relay, fuse, and stick on switch. This should allow me to have ample protection against fires and I can give the seat motor power when/if I want to move it and then click it off to make sure it doesn’t constantly have power. I am planning to get a 6 switch Auxbeam panel in the future and will just have it be one of the dedicated switches on that. The harness was literally like $10 or $12 on Amazon and should accomplish what I need…fingers crossed.


The purple to orange lining up still had the seat heater functional? So funny that 1 and 5 are the only pins you need at the end of the day.