Since this thread over at t4r.org is missing pics and we don't already have a thread I am going to PLAGIARIZE THIS WRITE UP by Matt Starr. I am just adding my own pics since his post doesn't have pics anymore. The text in this thread is all copy and paste for informational use.
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There doesn't seem to be any instructions on the web on how to do this with a 3rd Gen 4Runner so I took it upon myself to write one up, so here ya go.
This modification will allow you to use your e-lock (electronic locking) differential in 2WD, 4HI and 4LO.
Begin by removing the 4 screws holding down the door sill.
Then remove the kick panel by pulling it straight back.
Now locate your 4WD control system, it's a black box that says Toyota in big letters on it with a white harness plugged into the bottom of it.
Disconnet the harness and locate 2 wires. One is be Blue w/ Red stripe, and the other is Green w/ Orange stripe. The Blue/Red wire controlls only being able to use the locking diff in 4Lo. The the Green/Orange wire controll the 5mph safety.
Next, cut the Blue/Red and Green/Orange wires and twist them together. Using another piece of wire, connect one end to your twisted wires and connect the other end to a ground. You can also ground them individually if you only want to disable one of them.
Once everything is connected, tape off the two remaining wire that are no longer used and plug your harness back into the 4WD control box
The advantage to locking your differential is so that both tires will spin together instead of individually and thus giving you better traction. HOWEVER, I do not suggest leaving this on for long periods of time on dry pavement while in 2WD because it can wear your tires unevenly and also may cause problems with your differential. But however you decide to use it, enjoy it.
_______________________________________________________________________________________________________________________________
There doesn't seem to be any instructions on the web on how to do this with a 3rd Gen 4Runner so I took it upon myself to write one up, so here ya go.
This modification will allow you to use your e-lock (electronic locking) differential in 2WD, 4HI and 4LO.
Begin by removing the 4 screws holding down the door sill.
Then remove the kick panel by pulling it straight back.
Now locate your 4WD control system, it's a black box that says Toyota in big letters on it with a white harness plugged into the bottom of it.
Disconnet the harness and locate 2 wires. One is be Blue w/ Red stripe, and the other is Green w/ Orange stripe. The Blue/Red wire controlls only being able to use the locking diff in 4Lo. The the Green/Orange wire controll the 5mph safety.
Next, cut the Blue/Red and Green/Orange wires and twist them together. Using another piece of wire, connect one end to your twisted wires and connect the other end to a ground. You can also ground them individually if you only want to disable one of them.
Once everything is connected, tape off the two remaining wire that are no longer used and plug your harness back into the 4WD control box
The advantage to locking your differential is so that both tires will spin together instead of individually and thus giving you better traction. HOWEVER, I do not suggest leaving this on for long periods of time on dry pavement while in 2WD because it can wear your tires unevenly and also may cause problems with your differential. But however you decide to use it, enjoy it.
