Power divider switch indicator always on

Start by checking that the front diff is actually unlocking when the switch is off. IE no air in the hose going from the frame to the diff housing down by the axle shafts. If no air then make sure the actuator is actually in the unlocked position and if so then you’re gonna have to start tracing wires unfortunately.

 

If you unplug the diff lock sensor wire does the light go out?

 

Did you have your front locker engaged and then the light stayed on? Or did the light just randomly light up?

It's possible your locker is stuck in the engaged position but you should be able to tell if it is, would be driving funny and making noise when turning.
I'd guess the difference lock sensor is bad. But I'd find out sooner than later. If by chance your diff lock is engaged that's hard on stuff

 

Power divider is switch to the left, and as long as it’s off should automatically disengage cross locks IIRC.

try swapping the switch with the rear or spend the $50 on a new one, worse case you have a good spare

 

That’s not your power divider, that one and the one to the right are differential locks. They lock the axle so both wheel ends get 100% power. Since it’s been that way since 2017 I’d it’s just an electrical issue. If it was locked in and running the highway that rear would of been toast by now.