If your car is a Discovery 1 the ABS fault code 2-4 means Recirculation pump motor locked .
To check this you need to disconnect the 35 pin connector from the ABS ECU and connect a WABCO or LR diagnostic connector to the cable connector and connect pins 9 and 11 Switch the ignition on and the modulator pump should work if not it indicates the modulator needs replacing . Regards Jonathan