First post newb

Hello fellas, new here but not new to Toyotas or 4wd. I just picked up a 2010 4wd DCSB off road. It has 70k and is surprisingly clean but it came with a problem. If I put it in 4wd it locks the rear locker, high or low doesn't make a difference. The rear locker button is not on and the dash light does not indicate that it is on but it is locked as far as I can tell. I have owned several trucks with arb lockers so I'm pretty sure I know the feeling of a locked axle. The dealer that it came from has given me 60 day 2000 mile warranty so if I can figure out what is wrong they are going to fix it, so the clock is ticking. Ant thoughts or help would be appreciated
Thanks

 

Seems to me that the dealer should figure out what is causing it, not you.

That being said, its possible the previous owner did some creative wiring to intentionally make the locker come on immediately. Check behind the locker switch, and around the actuator if anything looks non-stock.