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Old May 30th, 2012, 04:44 PM   #1
eagle-eye
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Default OBS psd abs problems

ok, so this truck has some issues. when i got the truck the brake pedal was very low, which i figured to be that the brakes were getting very low, however it was still driveable. About a week after i bought the truck the brake pedal went straight to the floor, no abs light, no parking brake lamp, nothing. So i got all new brakes, pads, rotors, hardware, drums, shoes, hardware and self adjusting kit, and a master cylinder. While bleeding the brakes the abs light has come on and WILL NOT go out. The pedal is up and brakes are all good. The pedal however is quite hard to push until about a half inch down then gets soft like a normal brake pedal. When sitting stopped it will kick back at you releasing the brake pressure. If you rest your foot on the brake pedal to where it just lights the stop lamps and turn the key to run, the abs light will come on shortly then go out as normal. let your foot off of the brake pedal and it comes right back on. do the same thing as you start the truck and it does it again, and the light will stay out as long as you have your foot on the pedal. as soon as you remove it the light comes right back on. the code from the abs module is 12 which means low brake fluid durng abs stop. I have checked everything and my boss insists that is this infernal rabs valve. but it is not a hard code. SOMEONE PLEASE HELP! this is driving me crazy and i almost cant take it anymore. thanks in advance and i know it is a lot to read.
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Old July 18th, 2012, 11:36 AM   #2
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It is pretty easy to bypass the rear abs valve. I have had to do it on a couple fords that had brake problems.
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Old July 18th, 2012, 05:39 PM   #3
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It's been awhile since I worked on one of these concerns, but don't you have to bleed the ABS module using NGS/WDS/whatever they call it now?
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