retrofit e-locker into limited w/ center diff lock

[Simmer]

Hey sorry for making a new thread, it's a new question and I'm kinda stuck.

Has anyone retrofitted an e-locker into a limited with center diff lock? Mine has a 4wd module and the wiring and tail for the e-locker ECU already. How can I trace where the other end of these wires are, to connect to my locker? Since they're bundled up in tape it's hard to trace where they go. I would assume down the scuff covers under doors, but maybe not? Was that where the factory wiring went when it had the e-locker option?

I'd much rather use what's existing than put in my own...

 

[Simmer]

The bundle of wires top right with the hanging block plug is the one that goes into the black e-locker ECU (which I have)

 

[Simmer]

E=locker wiring?

This thread is super similar and basically exactly what I'm wondering. My rig IS pre-wired completely, and I want to just tie in to that instead of running separate. It's just a matter of finding where those wires terminate in the harness...

In the thread above, OP ended up just running separate.

 

[heat]

Two things that would make a huge difference:

This should be a sticky:

Please put your truck year, model, and motor in your sig. There are many
differences among the years, including changes in wire colors for similar
systems. In addition, no one can comment accurately on your situation
without knowing what your truck is.

Search for threads that have links to the factory service manuals. You're just
wasting your time without one.

Shit, I'll do it:

dropbox.com/sh/zu8ywkj4lycdmkq/AADvOekcs_dMAVH9EZYAxbFEa?dl=0
web.archive.org/web/20110102225436/http://www.ncttora.com/FSM/

 

[Simmer]

Two things that would make a huge difference:

This should be a sticky:

Please put your truck year, model, and motor in your sig. There are many
differences among the years, including changes in wire colors for similar
systems. In addition, no one can comment accurately on your situation
without knowing what your truck is.

Search for threads that have links to the factory service manuals. You're just
wasting your time without one.

Shit, I'll do it:

dropbox.com/sh/zu8ywkj4lycdmkq/AADvOekcs_dMAVH9EZYAxbFEa?dl=0
web.archive.org/web/20110102225436/http://www.ncttora.com/FSM/

Ahhh, I'm so sorry that would definitely be helpful.
1999 Limited (5vz) that did not come with e-locker so it had 4.1 gears. I put factory e-locker in rear and re-geared front end to 4.3. I will add to my sig

 

[Simmer]

So according to the resources you linked, it says the interconnection is below rear seat cushion at the frame. So I get that's the access panel for the fuel from above, but does that mean the wires travel under along the frame rail or up in the cab? I really need a tracer

 

[phattyduck]

So according to the resources you linked, it says the interconnection is below rear seat cushion at the frame. So I get that's the access panel for the fuel from above, but does that mean the wires travel under along the frame rail or up in the cab? I really need a tracer

There are tons of threads on this. Start your searching with this:

Alternate Search for T4R - 3rd Gen Section

-Charlie

 

[HiluxSurf SSR-G]

the wires from the Diff Lock ECU to the rear diff lock are included in the harness that runs to the rear inside the body. it then goes under the left rear seat and exits through the grommet for the fuel tank harness.

So according to the resources you linked, it says the interconnection is below rear seat cushion at the frame. So I get that's the access panel for the fuel from above, but does that mean the wires travel under along the frame rail or up in the cab? I really need a tracer

 

[Bumbo]

Do they sell the OEM electrical connectors/plugs for these connections?

Would be possible to make plug-n-play harnesses...

 

[Simmer]

the wires from the 4WD ECU to the rear diff lock are included in the harness that runs to the rear inside the body. it then goes under the left rear seat and exits through the grommet for the fuel tank harness.

So that's my issue is they don't go through the fuel access panel. So I'm curious where they stop so I can tie in there instead if running new wires all the way to kick, adding fuses etc.

Where would they have ended it? I do think a wire tracer is gonna be key here

 

[HiluxSurf SSR-G]

it is possible that the 4-wire harness is not present in your case then. this 4-wire harness is from the Diff Lock ECU to the Rear Diff Lock motor. This can be bought from Toyota. Not sure though if it's still available. Perhaps someone can chime in with the PN

So that's my issue is they don't go through the fuel access panel. So I'm curious where they stop so I can tie in there instead if running new wires all the way to kick, adding fuses etc.

Where would they have ended it? I do think a wire tracer is gonna be key here

 

[Bad Luck]

it is possible that the 4-wire harness is not present in your case then. this 4-wire harness is from the 4WD ECU to the Rear Diff Lock motor. This can be bought from Toyota. Not sure though if it's still available. Perhaps someone can chime in with the PN

Do you mean the Diff Lock ECU to the diff lock actuator? The 4wd ecu doesn't control the rear diff lock in any EWD that I've seen.

 

[HiluxSurf SSR-G]

my bad it should be Diff Lock ECU.

Post Edited



Thanks for calling it out

 

[Simmer]

it is possible that the 4-wire harness is not present in your case then. this 4-wire harness is from the Diff Lock ECU to the Rear Diff Lock motor. This can be bought from Toyota. Not sure though if it's still available. Perhaps someone can chime in with the PN

Yeah, I have this wiring but it's tying in to the existing is where I'm having troubles. I see the plug already to put in the diff lock ECU up in the kick panel. Just can't find the other end. It's not present near the fuel tank access panel but I'm going to keep looking

 

[Simmer]

I got a wire tracer and it sounds like it starts to travel down the scuff pad area under doors but then fades really quick despite the unit saying it can go for hundreds of feet.

 

[phattyduck]

Yeah, I have this wiring but it's tying in to the existing is where I'm having troubles. I see the plug already to put in the diff lock ECU up in the kick panel. Just can't find the other end. It's not present near the fuel tank access panel but I'm going to keep looking

The plug in the kick panel is part of the dash harness, different from the harness that goes down the sill. You aren't pre-wired on that harness then...

-Charlie

 

[Simmer]

The plug in the kick panel is part of the dash harness, different from the harness that goes down the sill. You aren't pre-wired on that harness then...

-Charlie

Ah, alright fair enough. I'll just wire it in then. Thank you

 

[Simmer]

The plug in the kick panel is part of the dash harness, different from the harness that goes down the sill. You aren't pre-wired on that harness then...

-Charlie

Hey! following back up on this after a while of back-burnering.

So, I'm still trying to locate the wiring that runs from the kick panel e-locker ECU to the rear diff wiring. According to the diagram mentioned above, I am looking for connector BO1 which appears to be downstream of BN1 / BN2. I have located BN1 and BN2 under the rear seat cushion in the fuel access area, but the trail goes cold from there.

I'm 98% positive I am pre-wired, as the plug up in the kick panel for the ECU module is the full 10-pin, 8 of which run back to the rear diff (to B01);

It says that it's along the "frame wire" - does this mean inside the cab or below the body on the outside of the truck? The diagram isn't super clear on that. It does appear to be distinctly different from "Floor No.2 Wire" which is the scuff panel wire bundle. So where is this frame wire?

 

[Simmer]

Okay so I made a ton of progress. I'll post the info here if anyone is curious and finds this thread years later.

There are two different variations of the "Floor No. 2 Wire" harness that runs between the IE1 and IE2 block plug connectors in the kick panel and the BN1/BN2 block plug connectors near the fuel access door under rear seat cushion. (at least for Limited trims)

82162-35300 is for e-locker and has more pins running between the two, whereas

82162-35190 is the non e-locker version. (mine) When someone opted to have the factory e-locker, Toyota would swap out this harness.

The wiring above IE2 and IE1 is all present and the same harness. Thus, the gauge cluster RR indicator light, and RR Diff Lock switch are already pre-wired, with the wires running down into the e-locker ECU block plug.

The ECU block plug connector has pins running into IE1 and IE2 which stop there, unless you have the above harness.

The part number for wiring harness between BN2 and BO1 is 82164-35740 with diff. Without diff is 82164-35720

Hope that helps someone.