You really dont want ABS in the winter anyway, at least in snow.
Most common issue is the rear abs sensor, although since you just replaced bearings with sensors its possible one isnt working right. Downside is that the dealer is needed to pull the codes and 100 to just read them I dont think its worth it yet.
IMHO, replace the rear abs speed sensor on the diff. Its about 20 bucks and takes about 5 minutes.
The 4wabs 4wd trucks also have a "g switch" that measures movement so it knows if all 4 wheels lock and your moving. The 2 systems are not really linked but this is as close as they get.
99 x-cab 4x4 4.0l auto
mods, cranked t-bars, silencer delete, k&n drop in, Rebuilt trans ,Trans Go stage 3 shift kit, 3200stall Fuddle Racing Torque Converter,
VANIR 63mm TB, Roush split rear exit exhuast, E-Fan, JBA Headers
Auto up/down both windows, OHC, EATC (soon to be modded)
03 Crown Victoria Police Interceptor