99 S80 2.9 starts but has no power to accessories
 

This is really odd! The car starts just fine but sometimes I does not have any power to accessories, as if the car was off. No lights, p-windows, dash lights and it won't come out of park. I am lost. I was thinking that maybe it could be the ignition switch but I am not sure and would like to verify what it is before I just start throwing parts at it. Any thoughts?

Ignition switch