When the keyswitch contactor closes, it delivers pack voltage to the controller. It's in parallel with the pedal contactor. There's no relay for time delay or anything, though. It only lights briefly (1 second or so).
FYI:
http://forkenswift.com/offsite/schem...ft-current.gif
It was also probably one of the most asked questions we got on the weekend. We tried to come up with a better, funnier answer than "precharge resistor" but failed!