Odo on/off, vent only working on high and pwr windows not closing.
 

I have a 2001 Xterra, and I am not sure if a fuse is blown or if the battery is dead or what. First the odometer started to turn on and off intermitently but it still counts km. Next my vents stopped working on levels 1, 2 and 3 - they only work on high. Then my windows will not go up after I put them down - they are power windows. What next?! Any info would be greatly appreciated!
Thanks!