All my symptoms(i.e., radio, a/c, mirrors). I replaced the ignition switch twice with no success. I’ve checked all fuses. Is there another possible problem and or fix.

 

you'd need to check a wiring diagram for common circuit points - ie a ground, a relay and whether the CEM is in the circuit (CEMs have internal relays ) then start probing with VOM. Also you may want to inspect wire runs, particularly if you park where mice can get at the car (common issue here in the northeast).