ahh, yah, our cars use fuses, not circuit breakers.
ive not unplugged the steering lock on mine since im running RevC with no issue and have a working RevB as backup so i cant reproduce the issue on my car at this time.
from what i understand, the passenger side SRS auto on/off is a little tricky. it is completely off when it senses no weight. then is on when it sense weight, but if the subject is heavier than a certain weigth (80lbs or more ?). if your child is sitting there with his/her booster it led should turn on (SRS off)...given that the kid is less than the threshold. i dont know exactly wat that weight is.
ive read some guys with smaller girlfriends have had issues where the SRS would turn off when they sat in the seat...just as if it was a child with booster seat.
someone can chime in more....