My second post about the pedal knock...i have replace the rotors, pads and rear brakes..my hub bearings (4x4) are fine..it only knocks like the abs brake feel from 25-15 mph..and does not do it in reverse at high speed..my question is I know it has to be the abs system..I have had alot of ground problems with my wiring harness this winter (fan,tranny down n up shifting on its own) does anyone know where i can get a full wiring schematic on the abs system...haynes doesn't cover it.this is a great site..I'm new to it..what I like about this site is I have been working on my own trucks for 30 yrs..and iIfigure I know alot...but when I have a problem someone on here always has another approach..it's like having ten mechanics in your garage.....