Since the E-Locker was never available in a Hilux (including 3rd gen) I am assuming you are talking about a 3rd gen 4Runner (Tacoma style)? If so then, based on the amount of wiring used with the E-Locker setup, my bet is that the wiring does not exist on your truck and that you will have to wire it in yourself.

I wired mine using 3 relays with a simple toggel ON/OFF switch with "Engaged" indicator light. I was supposed to make a layout of the circuit I used but I cant find my notes, so I will have to trace the circuit out long hand, which is something I haven't had time for...

There are a couple good sites with converting a non-E-locking housing to an E-locking housing, such as:
http://67.122.16.97/carterman/4runner/mods/locker/
and
http://www.4x4wire.com/toyota/tech/electric_locker/








I still need to get an E-locker for my front end, so for sure I will make a circuit drawing for the wiring when I set it up

Also, we sell the required gasket, studs, washers, nuts, and even the factory wiring loom which can be found here:
http://www.marlincrawler.com/htm/diff/pickup_diff.htm


BigMike