96 dodge intrepid heater windows and airbags stop working?

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 miles96 dodge intrepid heater windows and airbags stop working?try to check it out first on auto repair shop...96 dodge intrepid heater windows and airbags stop working?intrepids are well known for electrical problems. my old intrepid had a few and i couldnt find out what was causing them. the best thing is just to get rid of the car because intrepids are money pits.