Interesting. It likely is due for a brake fluid change anyway. Interestingly, I went for a longer drive this afternoon and the light shut off after about 5 min or so. I did engage the parking brake and made sure it would hold against a tiny amount of acceleration in case something exciting were...
Currently in the midst of the ice here in north Tx. went for a short drive to see how the 100 handled the snowy conditions and noticed that the BRAKE light stayed on throughout the drive. ABS did engage during a couple of skids but otherwise seems like the brakes are performing as normal...
Finally found someone with my same problem.. Hey OP, you remember if the connection had a gasket or just FIPG? Also, what did you torque it to when reassembling?