Rear Diff Lock Actuator Wiring/Controls Different for Different Years? (1 Viewer)

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May 25, 2020
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I just swapped an FZJ80 rear end into my 2005 Tacoma TRD Offroad instead of rebuilding the stock rear axle, and so far have everything working...except the locker, which of course is stuck in the locked position so I can't drive anywhere. The sensor is exactly the same, and the dash light tells me it's locked, which it is.

The actuator is BRAND NEW. The plugs for the actuator on the Tacoma 8" and Land Cruiser 9.5" were *slightly* different (some tech somewhere told me they were the same before I dove into this project), but the pin configuration and wire colors are exactly the same. So, I swapped plugs. I can hear the 4wd ecu in the dash trying to unlock the axle, but nothing happens at the axle, no noises, nothing. So, did I screw up and swap in a completely incompatible locker or is there something more simple going on, say like I have a dud actuator or it might not be clocked right from the factory?

If there is any way to unlock this thing manually just so I can drive around until I figure it out that would be a good start. I can force it to unlock by sticking a prybar in the sensor hole, but it just pops back to the locked position due to the force of the clock spring in the actuator (no motor movement that I've seen so far).
 
Have you tried direct current at the motor?
Sometimes the relay boxes and wiring have a little too much voltage drop.
 
I realized something, the two thick wires (green and green/red stripe, I'm assuming power?) are switched on the Tacoma wiring harness. Maybe this is the issue? Out of curiosity, what is the correct polarity for these wires?
 

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