Clearly in my mind the flashing (RR crossing) ABS lights have nothing to do with the ABS working or not.
I rebuilt my rear master cylinder and thought a short ride to let any air bubbles group and cycle the ABS. I started off and the ABS lights are flashing. No problem I will reset the ABS when I stop.
After a few blocks I think it is a good time to cycle the rear ABS. At low speed I stomp on the rear brake, the bike fishtails about. As I am countering the fishtail I am thinking why isn't the ABS kicking in? Duh, because the bike clearly is saying that ABS is not working.
So after resting the ABS I run the test again and it works fine. It was a good thing the ride was short because I think my mind was not fully operational.
