1993 Oldsmobile 98 low speed abs apply

have a problem with low speed abs apply less than 10 miles and hour rsistance for the sensors as well as the circuits are within a range specified by gm also the ac voltage is within range for front and rear do not see any sensor dropping out at all both rear bearing assemblies are new from napa and came with sensors the front are oe no codes and no other driveability problems to speak of only thing i noticed is that the voltage generated on the rear is half of the front at same road speed but still within the acceptable range any input would greatly be app..