. "how did you depress the calipers? because if you didnt crack the bleeders you could have pushed dirt back up into the ABS unit and something could have gotten clogged, as for simpler fixes i would start by checking to make sure the wheel speed sensors and the exciter ring(notched ring on axle) are clean and dont have any grease or other debris, check the wires going to the wheel speed sensors." . . .