Button:

2 = A,AA,BB,CC on front/rear roof sign
3 = Front Destination like far rockaway
4 = Rear Destination like 207th st
5 = exp/local on/off as display
6 = NR/SR Light On/Off
7 = Marker Light Changing
8 = NR on side
9 = SR on side
0 = Route on side

Green = Green
Red = Green
Yellow = Green
White = Green

Green = Red 
Red = Red 
Yellow = Red 
White = Red 

Green = Yellow 
Red = Yellow 
Yellow = Yellow 
White = Yellow 

Green = White 
Red = White 
Yellow = White 
White = White 