Hi,

I've a coupe 68, auto, 289. Last fall, I used a heatblower 12V in the cigarette lighter. Something happen   and now I have a problem

The problem is, after a few second after the car is started, a complete shut down occure. The key is at position ON, but no dash light, radio, wipper, etc.

The power is back by it self after 10 sec.

Ring a bell to anyone ?

thanks
Kurdy
Quebec, Canada  

Sounds like you have a bad relay switch. Find it in the shop manual and test it with a test lighton the output side after you start it up.  

thanks