elocker wiring and switches

[2ndGenToyotaFan]

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

 

[GRM]

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.

Here ya go:

http://www.yankeetoys.org/Documents/FJ80_DiffLock_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:

https://forum.ih8mud.com/79-95-toyo...ng-trd-elockers-fzj80-elocker-ecu-switch.html


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

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.

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:

https://forum.ih8mud.com/79-95-toyo...ng-trd-elockers-fzj80-elocker-ecu-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]

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

 

[ryaneddy16]

Retroing an elocker into a non elocked FZJ80??

Great thread and I've probably overlooked the answer to my question by getting a bit lost in the detail but .......

I have a '95 FZJ80 w/out differential elockers. The truck does have the "diff lock" for the transfer case but not the elockers for the axles.

I have since acquired a rear axle from a '95 LX450 with an elocker and the stock FZJ80 dash switch but could not locate the ECU as it may have been snagged by the lucky SOB who got the front axle.

My question,

1. Is my "non elocker FZJ80" already equiped with the ECU as it appears to be included in the "diff lock" circuit for the transfer case and if so, where can I locate it within the truck>

2. Does my existing wiring harness have the connections needed to attach my dash switch and axle?

I was originally under the impression I needed to add an ECU and front and rear sections of wiring harness as well as dash bulbs to retro the locker but after talking with a Toyota parts rep, came away with the impression that I may already have the ECU and harness parts needed.

Planning on starting the project this weekend and thought I might minimize un needed damage as well as pain and suffering by tapping the knowledge of ih8mud.

thanks for your help.

 

[Pat4x4]

don't bother with the factory stuff.. Call 12voltguy.com - Home simple, clean, with EVERYTHING you need for your rig.. from plug at diff to switch and panel

 

[WarDamnEagle]

Answers in red.

Great thread and I've probably overlooked the answer to my question by getting a bit lost in the detail but .......

I have a '95 FZJ80 w/out differential elockers. The truck does have the "diff lock" for the transfer case but not the elockers for the axles.

I have since acquired a rear axle from a '95 LX450 with an elocker and the stock FZJ80 dash switch but could not locate the ECU as it may have been snagged by the lucky SOB who got the front axle.

My question,

1. Is my "non elocker FZJ80" already equiped with the ECU as it appears to be included in the "diff lock" circuit for the transfer case and if so, where can I locate it within the truck>

The ECU is located in the right kick-panel and no, your 80 does not have the factory ECU included.

2. Does my existing wiring harness have the connections needed to attach my dash switch and axle?

Possibly but I don't think so. Do some searching in the 80 forum as several have done this retrofit. There is an 80 FAQ (top of the 80 forum) and I know that it has a write-up on a complete retrofit.

I was originally under the impression I needed to add an ECU and front and rear sections of wiring harness as well as dash bulbs to retro the locker but after talking with a Toyota parts rep, came away with the impression that I may already have the ECU and harness parts needed.

You will have to install the dash bulbs as well.

Planning on starting the project this weekend and thought I might minimize un needed damage as well as pain and suffering by tapping the knowledge of ih8mud.

thanks for your help.

The ECU's can be found. Did you get the wiring connectors with pigtails (at least a few inches of wire) with the switch? That makes it easier as the factory wire colors are helpful. Also, when you source the ECU then you need to make sure you get the connector with a foot or so of wire attached. You will also need the factory harness that connects to the elocker if you didn't get it. It only costs about $30 from the dealer. You can easily use 6 conductor trailer cord for the wiring from the elocker harness to the ECU and switch.

You might find this thread helpful as well as it's a concise write-up of the thread that you just posted in. Just keep in mind that the elocker harnesses quoted in this thread is not the one that you need for your 80 elocker diff.

https://forum.ih8mud.com/79-95-toyo...ng-trd-elockers-fzj80-elocker-ecu-switch.html

don't bother with the factory stuff.. Call 12voltguy.com - Home simple, clean, with EVERYTHING you need for your rig.. from plug at diff to switch and panel

He makes nice stuff as I've said before but there is no way that I would use a flip switch panel for a retrofit of elockers in an 80. Of course this is just my opinion FWIW.