On the not so common but still possible list of things to check... .
I recall that my '94 had a switch on the LH fender well with a vacuum line going to it. I know that would trip the dash brake warning light if it failed or developed a vacuum leak. I cannot remember if the ABS light came on as well or not. It has been a while. If yours has the vacuum booster I would give that a look if the sensor does not fix the issue.
Mike.