bigboy65_98

This is my first post first off this site is awesome i have been able to find the fixes to all my problems until now by using this site.
The Problem i have been having an issue with my abs speed sensor on my passenger side. I have replaced it three times and everytime the brake light and the abs light are on in the truck. After the third replacement i took it to the dodge dealer where they replaced the abs module, that didnt work either the abs light and the brake light were both still on. After about two weeks without driving it i got into it today to trace the abs speed sensor wires and the light were off. Took off down the road and when i hit the brakes the pedal was hard and the brakes shuddered. Then the abs light and the brake light turned on. I came home and bled the brakes bake to front got back in it to test it and the lights were off. Started down the road hit the brakes and the pedal was very hard to push down and the brakes were shuddering again. And again the abs light and the brake light turned on. So when the abs and brake lights are off the brake pedal is very hard to push. And after braking a few times the abs and brake light come on and the truck brakes fine. I am stumped and any advice would be appreciated.

Junk Man

Get your $$ back from the steal-er because of mis-diagnosis. Do you have any codes?

patdaly

Yep, you need to know the ABS codes.

Possible dump valve on the ABS system. Is it 2WABS or 4WABS?

rebal

also a wheel bearing going bad can cause that, look real close at the sensor to see if there might be a small metal sliver on it. I had that happen on my truck

RowJ

Pull the ABS relay (drivers side, under the hood). Kills the ABS....which I don't care for anyway.... and will give you good drivability.
Your sensor is showing no rotation..... so the computer thinks your in a skid. Thus....hard pedal, blocking more brake application.
Very dangerous!
I had it happen at 75 mph on the interstate. IF not for the grass medien, I would have rear ended the guy with the blow out in front of me.

Don't know why your replacement sensor isn't working but don't drive with the ABS light on and the system working.
Can't remember if pulling the relay kills the light or not??

RJ

patdaly

X3, forgot about this possibility.

DodgeRamdiese01

curious as to how this is solved as my truck did this during a heavy rain storm, and only when i would start up the truck from a brief stop my ABS and brake lights been on for 2 years now, never did the hard pedal thing before and after that one day never did it since good luck