My ABS light flashes constantly while driving. I had it hooked up to an ABS code reader and it said intermittent signal rear wheel sensor. I had already replaced the sensor prior to that and I replaced it again after that thinking maybe it was defective. I traced all the wiring and checked all the fuses. Any other ideas as to what would get rid of this light?!

 

Make sure the connector isn't corroded, and is making good contact.

Make sure the sensor is seated all the way down.

 

Has there been any repair work done on the rear diff? You could have a tone ring missing or damage tooth on the rear carrier.

 

I changed the fluid a few weeks ago. I recently bought the truck and the light was flashing when I bought it. When I changed the fluid I spun the gears and didn't see anything that looked broken or any missing teeth. I'm not sure what the tone ring is I'll look that up.