Steps taken so far:
1) Checked fuses both on the inside panel and power distribution panel under the hood.
2) Replaced the ABS/Speed sensor in the rear differential
3) Disconnected battery in an attempt to reset the ABS warning light I was receiving on the dash.
The speedometer/odometer still does not work. The ABS warning light will not go off. On gear selector the word "OFF" keeps flashing next to the word Overdrive.