For a couple of months, my ABS light was on. Just for the entertainment of myself and my passengers, I stomped and held the brake down for a long, long time while going about 70 mph. The front wheels locked up. I let off for a moment, then stomped and held it again. The front wheels locked up once again.
Yup, when your ABS light is on, you can't count on the ABS to work!
Thanks for trying my suggestion, even if it didn't solve your problem. Read Jeffrey's post. He has very detailed information based on experience.
Flunky