Abs and parking brake lights
#1
#4
#5
Join Date: Feb 2009
Location: Winnipeg, Manitoba, Canada
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could be the MC, or the proportioning valve. maybe a problem with the wheel cylinder. maybe a broken line somewheres down the line. I recently had to replace the rear line on the one I drive now because it rusted out and blew a hole in it
Last edited by RockGuardedDak; 09-25-2012 at 10:08 PM.
#6
It isn't leaking anywhere and the pedal is still solid. Front brakes stop the truck just fine. I'm thinking maybe the proportioning valve is stuck not allowing any fluid to the rear. I don't think it is a wheel cylinder because it is both sides on the back not getting fluid. Could be a line after the prop valve.
#7
Join Date: Feb 2009
Location: Winnipeg, Manitoba, Canada
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It isn't leaking anywhere and the pedal is still solid. Front brakes stop the truck just fine. I'm thinking maybe the proportioning valve is stuck not allowing any fluid to the rear. I don't think it is a wheel cylinder because it is both sides on the back not getting fluid. Could be a line after the prop valve.
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#8
I took the line loose on the abs hydrolic unit on the frame. It was the one that feeds the rear brakes and there wasn't any fluid there either. I started loosening the one where the fluid goes into the valve and some fluid started coming out so I just tightened it back up. I'm guessing this means that valve is more than likely bad. Am I correct or do y'all thinking should do further tests to see if it's something else?
#9
Ok new update. I put a new MC on the truck today and it didn't help so I pulled the ABS hydraulic unit off the truck tore it all apart and cleaned it up real good. Good news is I now have good fluid flow to the rear brakes. I have blead the brakes several times but the abs and ibrake lights are still own. Think I still have air or possibly another problem?