ABS troubleshooting

[01rbuild]

the brake pedal was pushing back, i read the forums and found the fuse solution.
i dont have a fuse but there is a black box ontop of the ABS spider with 2 relays and got them off and i guess my ABS is off cause no more problems. but i dont get an ABS light?
could it be that the bulb is burned out?
ok so how can i trouble shoot what is wrong with it before i just get rid of it!?

thnx

 

[ASHICK]

faulty speed sensor ohm all sensors if ok needs to be hooked to scanner and driven while moniitored