So after completely rebuilding the head on my 2007 Expedition I got a ABS/Brake light that came on. I pulled the code and it was U0121 - Lost Communication With Anti-Lock Brake System (ABS) Control Module
Prior to rebuilding the head everything was working fine with the ABS so it cant be a bad sensor on the wheel or anything so I am thinking it could possibly be a bad ground. I did after all have to remove like 4 ground wires when I had to pull off the head.
Does anyone know which ground wires are for the ABS control module so I can check it? Also, if it isn't a ground issue... what other things should I be looking at.?
Thanks!!
Prior to rebuilding the head everything was working fine with the ABS so it cant be a bad sensor on the wheel or anything so I am thinking it could possibly be a bad ground. I did after all have to remove like 4 ground wires when I had to pull off the head.
Does anyone know which ground wires are for the ABS control module so I can check it? Also, if it isn't a ground issue... what other things should I be looking at.?
Thanks!!