My '95 Z28 gets put away for the winter, but I try to start it every few weeks and move it up and down the driveway. Twice now, I've started it without incident, but then when I shut it off I hear a faint click (sounds like a relay, perhaps under the hood), and then all electricity is gone. No radio, no lights, no door chime, no starter ... dead as a doornail. It's just as if someone has disconnected the battery cable. In both cases, the power just as suddenly and mysteriously reappeared within an hour or less. It's almost like there is a thermal circuit breaker or some such thing tripping off, then resetting. And as I said, it does not happen every time ... only rarely. Any thoughts, experience, ideas, suggestions? Many thanks.

 

my car does the same thing, mine is the ignition switch connection. my car does it when im driving also, i will lose all my gauges and radio and everything. try that

 

Could be as simple as a loose battery cable.