HELP!! Factory wiring for FJ80 lockers (1 Viewer)

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

88chevota

88chevota

Joined
Jun 5, 2006
Threads
145
Messages
1,644
Location
Colorado Springs, CO
I am pulling a 80 apart for the factory lockers. Anyone know if I can ditch the factory harness and wire up my own? There are six wires coming from the diff. Anyone know how to rewire it? It looks like an all day job to just pull the wiring apart just for the harness on the lockers.
 
No reason you can't wire it yourself. Do you have an FSM for the 80? Are you good with relays and wiring?

I did something similar a few weeks ago for the factory center diff lock. I did not have the harness or computer, so had to make my own.
 
jetranger said:
No reason you can't wire it yourself. Do you have an FSM for the 80? Are you good with relays and wiring? I did something similar a few weeks ago for the factory center diff lock. I did not have the harness or computer, so had to make my own.
Click to expand...

What is the FSM? I understand how relays and such work.
 
88chevota said:
What is the FSM? I understand how relays and such work.
Click to expand...

Factory Service Manual!

I have a toyota elocker in my 4runner and built the entire harness myself. Several wiring schematics available on the web.
 
Here are a couple pics from doing some testing on mine. It's like a puzzle... I actually enjoy it for some strange reason.

20130908_205649.jpg


20130909_211126.jpg
 
I have been searching like crazy for diagrams. I was able to break down some of the wiring. I'll take a pic and post up what I have so far. FYI this is for the front and rear diffs. If anyone has a wiring diagram i could figure out what I am missing. It seems I need to find what relays i need now. Or does the e-lock ECU operate without relays?

That wiring is like a huge maze!!! ugh.
 
Last edited:
jetranger said:
...I did something similar a few weeks ago for the factory center diff lock. I did not have the harness or computer, so had to make my own.
Click to expand...

trying not to hijack this thread, but what did you do for that center diff lock? you can pm me. I have that exact issue. no CDL computer or body harness...thanks.
 
Here's a post from when I wired an elocker into my front 62 axle. Hope the links are still active....

"Figure I should link some of the stuff that's helped me.

Here's is "theferg's" write up on installing these lockers in a 60 series: Toyota 80 Series Electric Locking Differentials Retrofit for an FJ60

Drew Maurer's thread on putting one in the rear of his BJ 42: https://forum.ih8mud.com/40-55-series-tech/270721-elocker-install-40-series-ff-rear.html

Fast Eddy's thread on putting one in the front of a 40: https://forum.ih8mud.com/40-55-series-tech/226878-e-locker-asco-hubs-my-78-a.html

Here's the info I used for wiring: Outdoor Recreation Network - Off-Highway, Jeep, & 4x4 Fun
I used the first diagram shown with 2 DPDT relays (normally closed terminals ignored) and instead of having separate locking and unlocking lights, I wired one "motor" light in parallel with the motor. I am using a spare power antenna switch as a momentary SPDT switch to activate the locker."
 
Well, it is really simple to actuate the motor, just by adding power and ground. To reverse it, just switch them. The problem, especially with a worm gear setup like mine (not positive about elockers), is that there is a lot of torque moving through the gears, without a stopping point for the motor, it will move until it is not able to move any more. This will jam it in that position, and it will not spin the other way until you manually unbolt it and reset it.

Obviously, if you could see it, you could just actuate it until it is engaged, then stop. Being that you can't, you have to use the other 3 terminals on the motor. Those are 'stops', that break contact when the limit is reached so the motor doesn't jam. I used one relay for engage, and one for disengage.

Since the factory switch is an on/off, rather than momentary, it relies on the computer to figure out its travel. Without it, you will need to use a momentary rocker switch to actuate it. It will need to be a double throw so you can reverse the polarity.

I have not drawn up what I did yet. I will soon. I was just doing trial and error, and I was able to get it to work.
 
I built my own harness. It's not that hard. I used the inchworm instructions found somewhere on the net with a couple of DPDT switches from 12voltguy.
 
Well I went through the whole harness. What a PITA. Here is what I have. I also traced it back to the main fuse power and it operates of one relay.

Top is the computer.

Bottom left goes to the rear diff
Bottom middles is the switch
Middle middle are two wires that went to the dash from the computer
Bottom right goes to the front diff

There is one wire off each diff loom that also went to the dash. I'm assuming those match up with the computer wires to the indicator lights on the dash.

The relay had for wires. I traced three of them and have no idea where the fourth one goes because there are no wires left in the harness.

There is a blue and black that goes to the relay from the switch. A blue that sourced the power from the fuse and a white and black that sourced the ground. Then there is a green and orange from the relay that I'm not sure where it went. Maybe the center diff lock? Anyone have an idea?

image-857670538.jpg
 
Wiring diagrams are readily available which will answer all your questions. PM me your email and I'll email you the 1997 wiring diagram. It is very straightforward with diagram.
 
Chris Wilcox said:
Wiring diagrams are readily available which will answer all your questions. PM me your email and I'll email you the 1997 wiring diagram. It is very straightforward with diagram.
Click to expand...

Thanks. You rock.
 
zip file sent to your inbox a minute ago.
3mb in size, let me know if it doesn't work and I'll send pdf's
 
You must log in or register to reply here.

Similar threads

KillerPea
Another Possible Build, Looking for Feedback
Replies
10
Views
995
matzell
matzell
matzell
Heims vs Johnny joints for links on Driver
Replies
7
Views
2K
RustyLinkz
RustyLinkz

Users who are viewing this thread

Total: 2 (members: 0, guests: 2)

Share this page

Back
Top Bottom