I've sold a couple of hundred of these, as well as installed at least a dozen on my personal trucks and friends... my latest was my BIL's who lit the ABS light when he made a left/right turn and it would go off when the wheel came back straight... . we found that as you put tension on one of the cables as you turned the cable went open.
There is a specification for using an ohm meter for checking out the sensor...
We replaced the hub because I had one, and of course it came with a new cable and all was well.
BTW - these hubs can be lubricated using a high end synthetic grease. . When the rotors are off, you can pull the ABS sensor and grease the hub.