These links are for the Tacoma/4Runner E-lockers, but some of the wiring may help you out. Also, hopefully this will be a informative thread and I'll FAQ it.
E-locker install:
Outdoor Recreation Network - Off-Highway, Jeep, & 4x4 Fun
This is the Tacoma "Grey Wire Mod" so you can engage the locker in 2wd...
Toyota Minute Mod: The Tacoma Grey Wire Mod