interior light stay on... dont know why please help
 

I need help figuring out why my interior lights stay on. I have a 1994 Chevy Blazer S10. The radio clock, dome light, readers light, and mirror light remind even the the truck is off. All doors are closed so the dome light shouldnt be on. The clock radio remains on too. I tried taking the radio curcuit out but remains on. Anyone else know what it could be? Please help me out. Thanks