ok so i went to go and start my truck last night and when i did my 4x4 and 4x4 Low came on as if i was in 4 wheel drive but it wasnt engaged i know this because i drove a little down the road with it and it was in 2wd, so i turned my truck off then i started it again and it went off, so today it did the same thing and so i did the same thing but then i turned my hubs in and TRIED to push it in and i didnt come on, so is there somthing with the buttons? what do i need to do to make it turn on and engage i know my 4 wheel drive works i just went 2 days ago, but after i went it was fine but last night and today it was being weird

 

anyone?