around 6 months ago my ac/heater window and airbags stopped working and someone told me to change ignition switch and its been working fine until a week ago i changed the head light casing and the next day my car would not start after a couple of days of trying to figure out why it just started but all the same symptoms of last time plus my radio stopped this time so i got another new ignition switch but nothing so i took it to a mechanic and he said the wiring and fuses are fine but could not see the problem so i was hoping someone on here might know and how much it will cost to fix its a 3.5l v6 117000 miles