Rear e-locker swap wiring

I have some questions about wiring for an e-locker swap. I have dome this swap before but this particular swap has thrown me a few curveballs.
When I did this swap a few years back I had a 2002 pre-runner and was swapping in a 2003 rear end. I got all the parts from a junkyard from the same 2003 donor car (rear end, wire harness, ECU, dash switch, parking cable). Everything for this swap was simple - my 2002 was prewired at dash switch and the ECU, additionally the donor rear/frame wire harness's main connector plug that meets up to the forward harness beneath the drivers seat was identical to the donor truck connector plug. The wire colors even matched up perfectly. This swap was about as "plug and play" as it gets.
Fast forward to today.
I now have have 2001 Pre-Runner. The donor truck this time was also a 2003 and again I got all the same parts (rear end, wire harness, ECU, dash switch, parking brake cable) from the same donor car. My 2001 is pre-wired for dash switch and pre-wired for ECU which is great. The problem I have encountered is that the main wire harness connector(s) on my 2001 don't match the donor trucks connector. Instead of just one main, gray colored connector like is present on the 2002 & 2003 models, my 2001 has a series of 3 different shape, white colored connector. So my problem is trying to determine which wire from the differential connector plug goes to which PIN location on the ECU.
I did as much research as possible on this site and others. I have run my continuity tester to see which wires from my 2001 harness go to the which pin on the ECU plug. This is what I have come up with as far as what I think are the correct connections from the Diff plug PIN to ECU PIN.

Below is a picture of the main "under drivers seat" type of connector that came off the 2003 donor truck and worked with my 2002 swap (my 2002 had a matching connector). My 2002 connector had all the unused/open slots to accept the wires from the rear diff locker plug harness from the 2003 donor harness.



Below is a picture of my 2001 under-drivers-seat connectors that are different from the Gray colored single connector of the 2003.



Here is schematic that I put together for my wiring. This is what I have determined to be the correct "ECU PIN to Rear diff lock PIN" wiring.


Did I get this correct? If not, what is the correct wiring arrangement?
Thanks in advance.

 

Do you have the factory service manual?

 

Look for BN4 and BN1 connections

 

2003 diagram

 

I have a Factory 2002 electrical manual and a 2001 manual on the way.
I haven’t found the info I need in the 02 manual

 

the one you have numbered as #1 is for the sport seats. the elock wiring will be in one of the 2 larger connectors

 

see the highlighted in pdf file.

 

mechanicjon-
Thanks for the info, I am making progress.
The two "under seat" connectors I have are the BN1 and either a BN6 or BN5 (I can't make out if it is a 5 or a 6 in the diagram you posted - its too fuzzy to read). I definitely don't have the BN4 style connector. My connector that is either a BN5 or BN6 has 10 pins (5 top row & 5 bottom row).
Can you tell me if the diagram say BN5 or BN6?
Do you also have an image of what this BN5 or BN6 connector looks like so I can confirm?

 

These are for a 2001

 

That is very helpful - thanks!
With your help I have identified where I need to connect 3 of my 6 rear diff harness wires. These three wires: L-Y (Blue/Yellow), G-Y (Green-Yellow) & LG-B (Light Green-Black) all go to connector BN6. My BN6 male side connector has 3 matching color wires going to it from the Diff Lock ECU (I confirmed with continuity tester) and there is no BN6 female side connector present so it's pretty clear that this is the right location for at least my L-Y, G-Y, & LG-B wires from my diff harness.
See picture below of my BN6 connector waiting fir these 3 wires.


My BN1 connector challenge:
The last part of the puzzle for me is how to properly connect my remaining 3 wires from my diff harness: LG, V(purple) & W-B. The wiring diagrams shows these wires going to the BN1 connector which I have identified in my truck. I have tested continuity between these 3 wires from my ECU connector down to one side of the BN1 connector which is good.
The thing that is confusing me is that on the other side of these wires on the on the BN1 connector I was expecting 3 vacant slots on the opposite side of the BN1 connector where I could "plug in" my matching color diff harness wires but all of the slots in the BN1 connector are full with existing wires of other colors. For example: opposite the Purple (V) wire is a Blue/Red wire and opposite the Light Green (LG) wire is White/Black/red dots wire.
My question is: do I just splice into these wire with my rear diff wires? What am I missing?
Below is a picture of my BN1 connector full with wires/no vacant slots for my rear diff wires.

 

Would anyone happen to have a picture of their under seat wire harness connectors for a 2001 with TRD package/rear diff lock??

 

I don’t know why your BN1 connector is full.
But splicing into those wires isn’t a good idea.
You may have to bypass the BN1 connector and wire it to the R16 connector going to the diff lock ECU.

 

I didn't like the idea of splicing in either.
So that I am clear, when you say "I may have to bypass the BN1 connector and wire it to the R16 connector" does this mean that I should remove the 3 existing LG, V & W-B wires from the back of my R16 plug and then, in these newly vacant slots connect these 3 same color wires from my diff harness by routing them up to the kick panel/ECU area and wire them directly into the newly created slots in the back of my R16 plug?

 

Did you get the R16 plug from the donor truck? That’s the plug that goes into the 4WD ECU.

In the diagram above the LG goest to Pin 3 of the R16 plug. (M1)
The V goest to pin 2 of R16(M2)
The W-B is a ground wire. Technically it doesn’t even have to go to a pin anywhere. Tie to a good ground and it should be fine. But if you want to put it where the factory says, it goes to BN1 pin 5.

 

I have the R16 from the donor truck but I already have an R16 plug prewired into my my truck (tucked away unused).
Since the 10 wires of my existing R16 plug are already wired into the rest of the truck it seems to me that I should choose to use this existing, pre-wired R16 plug and remove the LG (pin 3), V (pin 2) and W-B (pin 5) wires from this plug and replace them with the LG, V, W-B wires from my donor, diff lock wire harness?? Does this sound correct?

 

That’s probably the easiest way. Unless you want to trace down where the wires in it now go. The W-B goes through BO1 and then to BN1. But that really doesn’t matter. If you had a helper, I suppose you ohm/continuity it out and find them.

But running them to the R16 plug directly is alot easier.

 

Great - thanks a lot.

 

I do have a follow up question:
While it makes total sense to rewire my existing R16 plus as we just agreed above, will disconnecting these 3 wires from the trucks existing R16 plug cause a problem in that these now disconnected wires are no long connecting to the BN1 connector and whatever wires they were serving on the other side of the BN1??

 

Disregard question above: since my existing R16 plug isn’t plugged in currently being used it obviously isn’t serving anything now anyway!!