What would Make the A/c / heat Blower motor the radio & power windows all stop working at the same time ? it is a 2009 crown Victoria Police Interceptor ...... i have replaced the ignition no help there all the fuses are good

One day the fan was working fine the next no air coming out when the dial was turned on any of the speeds or settings.

at cyl #5. replaced coil .no cel .about a 1/2 hour later misfire again cel steady on .