2003 Ford Explorer ABS Light on

I have an ABS Light on. I had an ABS diagnostic tool read the error and it said something wrong with the wheel speed sensor on the right side. I found on the internet that a wheel hub going bad could also cause this.I replaced the HUB that also came with a new wheel speed sensor. After replacing the wheel hub and wheel speed sensore the ABS Light is still on. What should I check next.