mike2016

Last week I took the G to Mammoth Lakes and the snow was very deep, so I attempted to turn on the lockers.

The center diff locked with no issues, the red light came on, however the Front and Rear locks won't engage, I press the buttons, the orange light stays on, but no red lights. Even after driving for some good distance.
Low range is engaged of course.

The car has only 15k miles and I'm the original owner.

Is it something simple to troubleshoot myself or should I send it back to the dealer for diagnostics?

Btw, even without diff locks used, i managed to get around no problem at all, the G performed flawlessly. I guess I only need the diff locks when I'm really stuck.
I'm running Bridgestone Blizzark tires in OE size