The advance relay when energized pulses the 100 pt RE. The advance relay is energized by:
1. Left or right top rollovers when not lit
2. Left and right bottom rollovers
3. Left and right rollover button switch
4. Left and right captive ball switches
5 "3 Advance" relay
One of these maybe keeping the Advance Relay energized. I would check these first to be sure none of them are stuck.