2008 F250 ABS Light

I have a 2008 F250 4×4 that the ABS light came on. Using Forscan, I was able to determine the right front sensor was losing signal. I had a local independent shop replace the sensor cable yesterday, but the light is still on. Looking at it with Forscan again, the sensor shows the speed, but the signal is very choppy and the MPH is slightly off, while the other 2 sensors are very smooth and read the same. What would be causing this? The truck only has 35,000 miles, but it did come from WI.