Ok so I have a 96 cherokee country I put it in 4 high or 4 low my light on my dash doesn't show it but it is working could this be a bulb blown fuse or what? I've check my fuse panel n all are good should I look at anything els? 4wheel drive is all working so its not a big deal but I'd like to try and fix it

 

Probably the indicator switch on the tranfercase, they get gunky. There a writeup or two on how to properly clean them. Could be a bulb too...