I am now having this same problem with a 2004 Dodge Ram 1500...the ABS
light and brake light stay on constantly, the speedometer jumps
erratically until the speed gets above 30 mph...and the cruise control
turns itself off immediately after turning it on. I was told about the
speed sensor on the rear differential and changed it....with no results.
Someone, please PLEASE help me....my warranty ran out about 1000 miles
ago and can't afford to take it to the dealership...