see if you have 2 bleeders on the abs pump right on the master cylinder, they face the front of the car, so if your at the bumper your looking right at them straight on. bleed them, just like a caliper. pump pump pump, hold, bleed. repeat.

i use a piece of vac tubing when i bleed these 2 because the fluid shoots all over the cross over and tranny. and hold the tube into a can or bottle to catch it. i do the same for calipers, why make a mess.