2001 fise box

i have a 2001 durango and my 4 wheel switch does not work. light does not come on at all on the switch.meaning when i start the suv the light or switch doesn't work .when i flip the switch to all wheel drive it does nothing. is it a fuse? and where is it ? and does anyone have a diagram of both fuse boxes, on the side of the drivers side and under the hood??? thanks bob