My Cars been just randomly setting an ABS light and disabling the ABS, but not storing a code! We have an ABS code scanner at our Autoshop, This is a solid light, NOT accumulator related, and will just go out when it feel like it, retarting the car doesnt do anything, it just goes off when ever,  i dont get it!

Wheel speed sensor would store wich wheel, and my Auto teacher did an ABS selinoid test with his scanner, wich cycled all the selinoids and if the pedal dropped too much the selinoids could be bad, but the pedal didnt drop very much at all, so he said there fine, what the heck??

This better not just be a PM3 thing, cause i HATE dash lights

I'm not sure if wheel sensors will store the mis-reading wheel or not. The way we found out which one wasn't reading on mine was driving it around a parking lot with the TechII hooked up to it. We watched the readings and saw that one of the wheels wasn't reading at all. Dead give away.
If you haven't tried that, I'd give it a try.

Check your CV joints you may have a ripped boot throwing grease on the sensor. When my boot ripped my ABS light would come on all the time after driving for a bit and would never store a code or anything.

CV boots are good, no rips