Ive been dealing with this issue for awhile, first it was off and on working, now the ABS light stays on all the time and the speedo/odometer will not work. I replaced the ABS sensor in the rear and it worked for about 50 miles and now its back to the same. Anyone have any ideas? Thanks

 

There is a Vehicle Speed Sensor on top of the rear differential that works your speedometer. Maybe a bad connection?

 

I also say check the VSS (On the rear diff)

 

The connection seems to be ok. I imagine if it was off and on that the sensor would come off and on, which it used to do but now it doesnt work at all and the ABS light is always on. Would pulling the codes and deleting them help? I may try that now.