Spent some time today with wires
1.Back door buzzer at door cut off (bus starts) wire leads to some steel box
2.Side back door with wheelchair buzzer cut off(bus starts) wire lead to black bostch 332 209 138 relay(disconnected it) bus starts.
3.Roof hatch and 2 windows interlocks tied together
a. Hatch extension interlock cut off(bus starts)
b. Windows interlocks behind wall didnt reach there yet but buzzer goes on if i pull latch.
c. Wire from them goes to the same box as back door wire
4.Pictures attached with explanation.
My question is what else left over to completely remove school safety features?