One other item. The voltage at C2 pin 2 on the BCM stays at ~+12V for the amount of time it takes for the 7-8 cycles, then goes to zero. I can hear a relay click when it goes to zero. The BCM has a couple of relays on board, so this must be one of them... but since I don't know how the BCM works this really doesn't seem to give me any other clues.