I incorrectly assumed that everyone would know that all services fed from the hot bus can be interupted
As an example:
On the B767 nose gear are a set of lights that show the status of the parking brake. That is either Brake On and Pressure available or Brake Off. Thus, at least one of these is always illuminated, even on a "dead" aircraft. In addition, one of the anti-skid system control relays is energised any time the gear is down. For parking the aircraft for more than 24 hours the parking brake and anti-skid circuit breakers must be opened.