[MikeTwoJay]

In the last few months the following problem occurs. I am driving and then all electrical instruments, radio, interior lights, etc. go dead completely. It usually lasts a few minutes and then the car starts and all is good. When it is shut down there is no power to the dash. The radio clock resets.

It has happened when the car is driving and cold, driving and warm, and when parked. What triggers the shutdown or the restart is unknown.

A few other facts.

1. When it first began the Security light on the dashboard came on and stays on at all times.
2. The frequency of failures is increasing from once a month to once a day.
3. After the most recent failure, the air bag light will not go out, and the tachometer guage is pegged off scale.
4 Just before the behavior started the heat lever does not change the heat level which is now stuck at high.