ABS not working properly - light on

WALTER-JUNEBUG SALGADO

MEMBER
2005 CHEVROLET TRAILBLAZER
V8
4WD
MANUAL
116,420 MILES

Hello,

I had to disconnect my ABS due to when I came to a full stop my brake pedal would vibrate when stopping. I replaced my front and back brake pads and rotors and also the two front ABS sensors. Last thing I was informed it can be is the ABS pump.
My question to you guys is can it be the ABS module or the ABS pump before I purchase one?

Thanks,
Walter S

1 Reply

AL514

MECHANIC
4,108 POSTS

I have seen this problem before, the situation was that the ABS sensors had too much of an air gap to the reluctor ring, causing the ABS to come on at three to four mph coming to a stop on different wheels and the ABS module was getting a wrong reading. Check for rust build up under all the sensors, even the new ones. You would be surprised that even a little rust build up between the hub and sensor will cause this problem. It increases the air gap and causes faulty reading. Considering how sensitive the ABS system is. Its an easy fix if this is the issue. Clean the rust out down to the original bare metal and reinstall the sensors. Go for a test ride and see if this fixes your issue. If not go to more technical issue. Hope for the best.