F150online Forums - Power windows and radio doesn't work

First of all I'd like to say that this is a great forum and I've found much info here for my truck, but I did't find nothing for the problem or problems that now I have,
I own a 2002 f150, both power windows does't work, I tryed with both switches(passenger and drivers) and nothing, the problem is that there's no voltage in the wires that go to the switches, I already checked fuses and everything looks ok, so I don't know where to check=S, also I read that maybe the circuit braker could be the problem, where I can find it??
any ideas of the problem????:(
second problem or maybe related is that my stereo doesnt work when I turn on the truck but if I put key on accesories it works=S
anything of info would help, thank you very much!