Hello - I m beat, got to ask the guys who solved this ABS light on issue. I done 29 tests if I ve done one. So far mostly things I CANNOT FIND THE CAUSE. SO Far I checked list:

car is 2010 GT 4.6 manual.

-Ohm test 4 wheel speed sensors, stumble on polarity does matter on these resistances. Found three 5 ohms, one open, buy new speed sensor and install. At one time i had all 4 hubs [axle] blocked up. Did not do spin tire read volts test.
-pull off NEG batt cable, lift out air...

ABS [again] light kickin the Ponies maximus