On Sep 24, 9:32*pm, "Robert Green" wrote:
While I believe that most door and window circuitry is rubber-booted and
generally weathproof

You're right that you shouldn't bet on all cars opening underwater,
but weather/waterproofing is not really an issue. Switches, relays and
motors (even the locks usually use motors) usually work just fine
under water at 12 volts without any protection, probably for hours to
days (until something corrodes too much). The battery will probably
leak down before the circuitry fails (maybe not if the computer is
involved).