Same problem here...1998 venture
Key in ignition when turned to starting position appears to shut off all power. Problem was intermittent, but is occuring more frequently.
Checked battery, as well as all grounds, still same problem. Problem occurs more frequently on cold days then warm days.
Acts like a dead battery, but had a new battery put in 2 years ago.
It is an AC Delco battery, has everyone else who has had this problem had an AC Delco battery?
Checked the wires under the drivers seat as well, all looks well.
Fuses all good.
Anyone have any more ideas??