[WarDamnEagle]

KLF,

I've now laid the two photos side by side (together they form one wiring diagram) and have a couple of questions of you or anyone that can read these diagrams. I would have sent you a PM but I thought this might be useful to someone else later.

I know that there is a maximum speed "switch" of 5 mph that must not be triggered in order for the ECU to allow the lockers to lock. I am guessing that this input to the ECU is Pin 4 on the ECU as I cannot find another purpose for this input. Also from another locker ECU write-up (but for a single locker ECU) it would appear that you just leave this pin unconnected (and not grounded). Does this seem like a reasonable assumption?

The second question has to do with some of the symbols on the diagram. These are octagon shaped symbols with the letter I or B followed by a number (e.g. "I 3") that appear where certain wire connections are located (but not all connections). I'm assuming these are just hard connections and aren't anything special (functionally speaking) but wanted to get confirmation from someone that knew for certain.

Thanks

[2ndGenToyotaFan]

These links are for the Tacoma/4Runner E-lockers, but some of the wiring may help you out. Also, hopefully this will be a informative thread and I'll FAQ it.

E-locker install: Outdoor Recreation Network - Off-Highway, Jeep, & 4x4 Fun

This is the Tacoma "Grey Wire Mod" so you can engage the locker in 2wd... Toyota Minute Mod: The Tacoma Grey Wire Mod

[WarDamnEagle]

Thanks Jerod. Unfortunately it will be late July or so before I am back in the US and can install the lockers. I will try to document with lots of photos, etc. I will then start a new thread and you can decide if you want to add it to the FAQ.

I think I have the wiring pretty much figured out. It will be especially easy if I can find the ECU connectors with about a foot or so of original wiring attached. I have quite a bit of time to try to source that. I plan on using an 80 switch and will also try to find an original connector, again with some original wiring attached.

The diagrams that KLF linked in the thread are pretty comprehensive and easily legible once printed.

[GRM]

I bought new harnesses for about $30 each from a dealership outside of Boston. I tried using used wiring, but found the harnesses I got were destroyed from sitting attached to the diff and rolling around at a wrecking yard floor.

As far as my switches, I ditched my factory stereo location for a Tuffy Console, and has 12 volt guy build me a new panel to incorporate my elocker, along with my other switches.

[KLF]

Originally Posted by GRM

I ditched my factory stereo location for a Tuffy Console...

Pics of said Tuffy console, please. My puny center console is too cramped.

[WarDamnEagle]

Great looking switch panel GRM. I have aquired an 80 elocker switch, wiring connector with pigtails for the switch, and an elocker ECU wiring connector with pigtails (to connect to the ECU) from a mud member who was parting a wrecked 80. Now all I need is some time and a 9 hour flight.

[GRM]

Originally Posted by KLF

Pics of said Tuffy console, please. My puny center console is too cramped.

I'll see if I can find a pic of it. I believe its a 10" wide one. I found it on craigslist from a guy who mounted it in his '82 mini truck. I pulled the front cup holder off, and Im waiting to find a center console from an 01-04 reg cab 4wd tacoma with a bench seat to put in place of the stock one.

Also note, I have single cases (so the rear shifter would have to go through the tuffy console), and a forward shift front case to make the tacoma console fit.

Below is a pic I stole off ebay of the tacoma console.

[WarDamnEagle]

I've ran into a bit of a snag trying to rationalize the wiring between the FZJ80 wiring diagram and a TRD elocker. What I really need are the factory service manual diagrams and operational description for a 97 through 01 4Runner elocker. I've posted the question over in the 95+ forum to see if someone has one.

http://forum.ih8mud.com/95-gen-toyot...ml#post3160997

I can probably figure this out on the fly during the installation but I have time to do the research so why not.

[KLF]

Here ya go:

Yankee Toys

[WarDamnEagle]

KLF,

Thanks, but I already have those drawings printed out. There does seem to be some inconsistency in these write-ups and none of them have absolutely answered my questions. Also, there is not a functional description with the TRD elocker drawings like there is with the FZJ80 elocker drawings. That link is a great resource however.

My plan is to take 2 TRD elockers with the factory harness, cut off the 8 conductor connectors and run 6 conductor wire to the FZJ80 ECU from each elocker. Ideally, I would like to know exactly how to connect the wires before I start. Therefore, I need to match the FZJ80 ECU pinouts to the TRD elocker pinouts. Most of the wires are obvious (e.g. ground, Lock position switch) but some aren't. For example, there are 2 motor wires, (light green/red and light green). I think power on to lock is green and power on to unlock is green/red but I can't be sure. I have a similiar problem with the 2 limit switch wires (light green/black and light green/yellow).

Unless I get confirmation otherwise from someone, I have concluded the following. If you look at the rear elocker on the FZJ80 elocker wiring diagram (link is in post 29), you will see 4 wires (2 for motor power and 2 for the motor limit switch) with wire colors labeled G-L, G, G-B and G-Y. If you then compare these colors with the wiring for the TRD elocker (link is in post 39, BTW they are from the same website which is a fantastic resource!), you find the wire colors as LG-R, LG, LG-B and LG-Y. Not surprising that they aren't exactly the same as they are two different elockers. I have decided, in the absense of any further information, that functionally the wires should match as follows:

FZJ80 wire color ................. TRD wire color
G-L ..........................................LG-R .................(Motor power)
G .............................................LG ....................(Motor power)
G-B ..........................................LG-B .................(Motor limit switch)
G-Y ..........................................LG-Y .................(Motor limit switch)

I have no evidence other than "gut feel" that the two motor wires and the two limit switch wires would wire up this way. One or both could be backwards. If I have some kind of confirmation on this one question, then there would be no guessing when I start wiring. I have everything else figured out.

If I can figure the rear elocker out, then the front elocker won't be a problem connecting to the FZJ80 elocker ECU as the front and rear elockers shown on that diagram are depicted exactly the same.

BTW, KLF, the link that you gave me in post 8 is excellent. Here is the link again:

Outdoor Recreation Network - Off-Highway, Jeep, & 4x4 Fun

This write-up gives an excellent explanation of the 8 pin factory TRD elocker harness with a pinout diagram and explains how to go from the 8 pin factory connector to 6 conductor wire to the ECU (1 pin isn't used and 2 grounds are rationalized into 1 conductor).

I think there is a mistake on the pinout table, however. I'm pretty sure that Pin 7, shown on the table as Green-Black, is actually Green-Red. In fact, the narrative under "Analyzing the Wiring" refers to the motor power wires as Green and Green with a Red stripe. FWIW.

If anyone has actually managed to read this far, apologies for my obsession with the detail on this wiring. I live in England most of the year and I will only have a couple of days to do this entire modification when we fly home this summer. I don't want to be trying to figure out wiring on the fly if I can help it. Also, I don't want to risk damaging 2 new TRD elockers because I have the wiring wrong. Assuming that I can get this to work, then I will write it up as idiot-proof as possible so that anyone that wants to make this mod with an FZJ80 elocker ECU and/or FZJ80 elocker switch can do so easily.

[2ndGenToyotaFan]

Thanks for all the effort to get this sorted out, and I look forward to the write up! !!!!

[GRM]

Originally Posted by KLF

Pics of said Tuffy console, please. My puny center console is too cramped.

I got a few pics snapped for you. Also note that the seats are out of a mistubishi 3000gt which give about 1" more room than toyota seats.

[WarDamnEagle]

I can tell that everyone has been on the edge of their seats waiting to see if I can get this wiring figured out!

I helped a guy out on Yotatech with his elocker and while he had it out on the bench we were able to confirm that the wiring assumptions that I made in post 40 above are correct. Everyone can relax now and quit pouring over those wiring diagrams that I referenced.

When I get this done (August) I will start a new thread and link the new thread from here....just for posterity.

[2ndGenToyotaFan]

Whewww!!!! I can get some sleep now....

[WarDamnEagle]

OK, I've had some PM's asking me if I have this wiring figured out. I think I do but I haven't tried it yet but I will try to summarize my thoughts. First of all you need to print out the wiring diagrams for the FZJ80 elocker system and the TRD elocker system. From previous posts, and courtesy of KLF, in both cases, I repeat the links below:


This is the wiring diagram for the FZJ80 elockers, switch and ECU.

[quote=KLF;3121151]Here ya go:

http://www.yankeetoys.org/Documents/...ck_Diagram.zip

Wiring diagram from the FZJ80 FSM. Note that it's a WinZip file, containing 3 GIF images.

NOTE and Edit from 09-03-2008: I have actually done this mod now and found that the colors on the 1997 FZJ80 elocker ECU were different from those referenced in the link above. Everything is explained in this thread:

http://forum.ih8mud.com/79-95-toyota...cu-switch.html


This is the wiring diagram for the TRD elocker (look under Tacoma elocker).

Originally Posted by KLF

Here ya go:

Yankee Toys

If you are using an FZJ80 switch then wire the switch per the FZJ80 wiring diagram. If not, then just install two switches in place of the factory switch and wire between pins 8, 12 and 6 on the FZJ80 ECU.

The other ECU pins should be connected as follows (I think!):

FZJ80 ECU Pin -------------purpose-------------TRD elocker pin
8---------------------Connect to Power
4---------------------MPH switch, leave disconnected
15--------------------center diff lock switch, connect to ground
13--------------------ground

1 (G-L) ---------------power to unlock rear elocker-----7 (LG-R)
3 (G) -----------------power to lock rear elocker-------6 (LG)
11 (G-B) --------------limit switch --------------------3 (LG-B)
10 (G-Y) --------------limit switch --------------------2 (LG-Y)
2 (Y-W) --------------lock indicater -------------------1 (Y-L)

5 (L-G) ---------------power to unlock front elocker----7 (LG-R)
7 (L) -----------------power to lock front elocker ------6 (LG)
14 (L-B) --------------limit switch---------------------3 (LG-B)
16 (L-Y) --------------limit switch---------------------2 (LG-Y)
15 (Y-B) --------------lock indicator-------------------1 (Y-L)

The ECU wire colors indicated are from the factory FZJ80 ECU wiring harness. The TRD elocker pin numbers and wire colors indicated are from the factory TRD wiring harness (factory part number 82127-35100). This is a harness that connects to the two connectors on the TRD elocker and has an 8 pin connector on the other end. The pins and wire colors referenced are from the 8 pin end.

On that 8 pin TRD connector end, you can use 6 conductor wiring to go to the FZJ80 ECU. You will notice that there are 5 connections listed above (7, 6, 3, 2, & 1). In addition, 4 and 8 are connected to ground and 5 is not used.

The lock indicators, ECU pin numbers 2 and 15 can also be connected to indicator lights as shown in the FZJ80 elocker system wiring diagram. I plan on buying 2 LED's for that purpose.

Just to recap parts, I have acquired the following for installation:

2 TRD elockers in 4.56 gearing (41110-3D010)
2 TRD elocker harnesses (82127-35100)
2 TRD elocker gaskets (4218-60050)
4 TRD elocker long studs (90116-08330)
1 FZJ80 elocker ECU
1 FZJ80 elocker ECU wiring connector with pigtail
1 FZJ80 elocker switch
1 FZJ80 elocker switch connector with pigtail

The FZJ80 elocker ECU, switch, and connectors were acquired from Mud members that were parting 80's.

OK, maybe that will answer all the questions for now. If not, question away.

Again, full write-up with pics in the summer.

PS: Teaser photoshop of switch and indicators....

[2ndGenToyotaFan]

This is gonna be a great resource, thanks for all the effort!

I assume the lockers will function like in the 80... Rear will lock, then the front?

[WarDamnEagle]

Yes, if you go with the FZJ80 switch then you can only lock rear or both front and rear, as Foxfab mentioned in an earlier post in this thread. I can't really imagine a situation where I wouldn't want the rear locked with the front locked. Obviously, often, you only want the rear locked but not the other way around. Of course I'm not a hard-core rock-crawler either.

Now that I think about it, it might be more than just the switch that would prevent you from locking the front independently from the rear when using the FZJ80 ECU. I will take a look at the diagram and logic description again and see if I think it would work with two independent switches. I know that the switches can be wired that way but the ECU logic might be the problem.

Originally Posted by foxfab

Bad thing about the FJ80 switch is that you cant lock up just the front e-locker. I\ts either REAR, or BOTH.

[foxfab]

true that the layperson wheeler may never need to lock up just the front, but if you are looking to front dig in a competition and have rear cutting brakes, then unlocking the rear helps radius tremendously.

[ms018kmf]

There are lots of awkward turns in trails around here where unlocking the rear end would be beneficial (mostly Sedona boulders). Not speaking from my own experience, I drive with another locked rig and that dude really wants to switch his lockers independently. From what we saw pulling the 80's switch it looks like they are mechanically defeated from independent switching. We're still not sure, an electronic override preventing this would not surprise me. Just gotta do a couple of small things to the 80 (all brake components + HG ) and we should have time to test the idea, maybe in 2-4 weeks.

Again, excellent thread.

[2ndGenToyotaFan]

If the 80 switch can not be modded to allow front only, maybe just a simple toggle switch inline to the rear locker that you could turn off in the odd cases you wanted front only....

[WarDamnEagle]

I have finished this mod and the complete thread write-up can be found at this link:

http://forum.ih8mud.com/79-95-toyota...cu-switch.html

I suggest if you have questions that you post them under the thread above and let this one die unaltered further at this point.

.....just a suggestion.

[Fantasma-4x4]

Today where i can buy the wiring harness ??...

Parto No: 82127-35100 Wiring harness from Differential Toyota.

[2ndGenToyotaFan]

I'm sure "Cruiser Dan" here on mud can get you one. Check the vender section for American Toyota (I think)

[WarDamnEagle]

Originally Posted by 2ndGenToyotaFan

I'm sure "Cruiser Dan" here on mud can get you one. Check the vender section for American Toyota (I think)

As Jerod said, CDan or any Toyota dealer. They are around $35.00.

You can also get them from Marlin Crawler or Inchworm.

Electric Locker Wiring Harness | Marlin Crawler, Inc.

Inchworm Gear - Toyota Rockcrawling Equipment

That harness only came from the factory for rear 8" elocker differentials so make sure if you buy from Marlin or Inchworm that you specify a rear application (or V6) even if you are putting the differential in the front axle. Do not buy the one specified as High pinion or it will not work.

If buying from a Toyota dealer then just give them the part number.

[WarDamnEagle]

For anyone that wanders into this thread and you are planning on installing a rear elocker only using a 4Runner/Tacome elocker ECU and switch, here is a great wiring diagram courtesy of 2ndGenToyotaFan (Jerod).

Picasa Web Albums - Jerod - Pictures

I've had quite a few PM's from people doing this mod with rear only elockers so this info should help them quite a bit. Thanks Jerod.

[GRM]

Everything in this post is awesome. Thanks for the research!

As an FYI for users trying to make a stand alone harness, the schematic shown on other websites doesn't always work. Obviously it works for the people who posted it, but it hasn't worked in the 2 elocker installs I have tried to use it on, or the elocker installs my friends have tried.

What happens is when you hit the switch to lock the diff, it only turns on the motor for 1 second, instead of powering it until the locker is engaged.

I highly recommend trying to use the factory elocker ECU if you don;t want your brain to hurt.

[GRM]

I just re-did my wiring. This works MUCH better.

This system uses a SPST switch, 3 switching relays, and a 3 amp fuse.

Factory plug looks like:

1 2
3 4 5

Ground #5

Relay #1

85: switched 12v+
86:Ground
87: 1
87a: 2
30: 12v+

Relay# 2

85: Switched 12v+
86:Ground
87: 2
87a: 1
30: 30 Connector on Relay #3

Relay# 3

85: switched 12v+
86: Ground
87: 3
87a: 4
30: 30 Connector on Relay #2