Behind my dash, there was only 1 available connector, and the connector did not line up with the RR Diff Lock switch. Then again, I have a stick, so I have a Clutch Cancel switch and maybe some other wiring that is different than the autos. Another thing, the RR diff lock switch connector should have 4 wires and a blank, not just 2. True, the 2 wires that you see in the diagram are what actually engage the locker and light up the dash light, but the other 2 are to light up the switch itself (Green wire and a Green/White wire if I remember, which will link the switch to the light dimmer for all the dash lighting). In my factory manual, I found that the free dash connector in my truck was really for a rear door lock/unlock switch--which is not present in any American 4Runners.
I also did not have a connector free in the lower driver footwell where the ECU goes. I have the dealer installed alarm system down there, so maybe that connecor may be used up for the alarm. If you truly followed those wires and found them coursing down the drivers side wire bundle going to the rear of the truck, you might actually be prewired. When I examined the wire bundle (under the left front and rear door foot scuff plates) I did not have the appropriate wires. When I looked at the parts microfiche, I also saw that the locker equipped 4Runners had a different wiring harness for the rear ABS. The major junction point for the wires going to the rear locker is under the rear left passenger seat. That is where the rear brake connectors and locker electrics come together. If everything at that point has the appropriate number of wires and the connectors all fit, than you'd be pretty lucky and completely wired. You should also check the combination meter to see if you have the appropriate wire feeding into the connector for the light (my connector did not have the necessary wire, so I had to run a wire from the combo meter connector to the locker ecu). Again, the wiring diagram and factory manual went a whole long way for me. You just might luck out and have a fully prewired truck, but all the 99 and previous 4Runners that I've seen have not been prewired.

<small>[ 10 August 2002, 04:51 PM: Message edited by: 3.4Runner ]</small>