How about cases where the ABS light is out [following lamp test] for a short time, then comes on typically just at a moderate bump [expansion joint for example]. Before the light comes on you can induce ABS activation [say by hard braking, with the right side wheels on sand or leaves]

I recall seeing something about the connectors in the relay socket needing to be re-crimped. If this is the fix, what sort of tool is needed? ["Kablex" connector tools?]