abs pump

[jallen69]

from the day i bought the my car (a4 1996 1.9tdi 110 afn) i had a creaking noise come from the ABS pump every time i braked, so ive just this morning put a second hand ABS pump on it, but its still the same if not a little quieter? does anyone else know what it could be? ABS sensors? or should i just bite my lip and go and buy a new unit? can someone give me some advice? thanks!

[towcestervag]

check wheel speed sensors
if no faults/lights on abs try pushing abs sensors home ie push abs sensors inwards with hand

[jallen69]

ive just noticed aswel, when you spin one of the rear wheels the ABS pump goes crazy, making loads os noises, is that right? or does that mean the rear ABS sensors are shot?
thanks

[towcestervag]

check sensors on diag machine
it may be a sensor or a rotor fault but your abs light should come on if faulty
try cleaning rotors first

[jallen69]

check sensors on diag machine
it may be a sensor or a rotor fault but your abs light should come on if faulty
try cleaning rotors first

ok, is the rotors the spline things near the back of the disc? thanks

[towcestervag]

yes