I swapped a lefty into my taco and here how i got my ADD "hub" to work without using the tcase switch. I first did the gray wire mod for the locker, all indicators on the dash work for that. As for the ADD and 4wd dash light switch, all i did was cut the harness off the 4wd indicator switch that's on the pax side of the tacse and put a two way switch in there that i mounted on the dash. ADD works and the factory 4wd light worked. I also remember reading that the gear drive switches can be wired into the taco factory 4wd wiring.