braking only at 4low

[liron sasson]

hi guys.new problem.
only at 4low (also if transmission shifter is on P) , the abs pump is braking by itself .
if im trying to drive its very hard because its braking all the time.
no abs\esp light
what do you think?

video:

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[Ksat]

Faulty pump maybe? Try bringing it to an auto store that reads codes and has a good scan tool. There may be ABS codes present. Also, I don't know if this is relevant, but I've heard many 4WD systems disable the ABS system when a vehicle is in 4 low (not sure about the libby), so it's interesting you're getting pump activity when in that range.

 

[KJowner]

Is it on one wheel or are all the brakes on? If its all of them it's got to be ABS, master cylinder or servo. Try pulling the ABS fuse.