I have a 93 Buick Lesabre and the ABS light was coming on and off for about three weeks.
Now it stays on all the time.
Just recently I had the brakes completely lock up on me.
In my car you have to apply pressure to the brakes to even get the car to shift into gear. The car will drive for about a mile and then all of a sudden the brake pedal is completely hard and the car will not roll forward. It does it completely fine in reverse.
My calipers are good and there is no sound of them locking up. The pads are in good condition.
Then after this happened to me twice in a two mile drive, struggling to get it home… now a light in the dash flashes SECURITY.
It is strange and I know my brakes are in good conditon and there is no abnormal wear and tear.