I will bet that is the culprit then. My scangauge has only caused that issue a few times over 3 years, but some others have it constantly. You can get a specific non-CAN cable from scangauge, or pull the pins for the particular issue.
You can try PMing LinearLogic, but I do not know if he will receive the message.
For me, when it happens, which is very rare (the spyder is my daily driver), it only blinks when I am pressing the brake. It also seems to stop shortly into the trip. However, it's only happened maybe 5 times in 3 years, so I don't know.
You can certainly test it by unplugging the scangauge before your next startup.
Just an update. My ABS was flashing after hooking up my ScanGauge II. I called them and two days later I had a new cable free of charge. Problem solved. Save your old cable if you want to use it in another car.