abs light on ,when brake pedal depressed , rear brakes lock up

Asked by Sep 12, 2015 at 07:19 PM about the 1999 Ford Expedition 4 Dr XLT SUV

Question type: Maintenance & Repair

replaced front brakes 2wks ago. suddenly abs light comes on ,then press
brake pedal and rear brakes lock up. replace master cyl and bleed well. no
change.have to shift in R to unlock brakes

4 Answers


Here is a good read on ABS brakes, I have a feeling you bleed the brakes wrong and bleed fluid back into the sensor...http://www.popularmechanics.com/ca rs/how-to/a461/2265091/

1 of 1 people found this helpful.

It is critical to follow the procedure when bleeding the brakes after a rebuild.


You need to all 4 brakes


You need to bleed all 4 calipers make sure you keep plenty of fluids and bleed all 4 lines to you get a steady stream out of each one of them starting to the closest caliber to the master cylinder which is usually the driver tire then take the positive cable off your battery for about two or three minutes hooked back up and light should stay off

1 of 1 people found this helpful.

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