It must be locked before removal and before installation. Check these links
http://www.ncttora.com/fsm/2003/Repair_Manual/03tacoma/sa/rdc3r/remo.pdf
http://www.ncttora.com/fsm/2003/Repair_Manual/03tacoma/sa/dlsy/insp.pdf
http://www.ncttora.com/fsm/2003/Repair_Manual/03tacoma/sa/rdc3r/disa.pdf
http://www.ncttora.com/fsm/2003/Repair_Manual/03tacoma/sa/rdc3r/reas.pdf
The links came from here
http://www.ncttora.com/fsm/2003/index.html
Those lockers all function the same way so don't worry about the FSM year other than the wiring colors may not be consistant.
That's my .02, I hope it helps you.


Wheeling a Stepside Tacoma on 37s
Exploring in a T4R Ltd V8