Spongy pedal that goes to the floor

Had to replace a brake line past the ABS module and now I have rear brakes but no front brakes and a spongy pedal that goes to the floor. Who ever had the truck last let the reservoir run dry. I bled the master cylinder and still the same results. So how can I manually bleed the ABS module or pump? It is located under the driver side drive and passenger door on the frame. How can I bleed it manually without a scanner or computer? Please help thank you greatly.