I just bought a '96 Chevy Blazer. The ABS light comes on steady. Attempting to troubleshoot, I found the lead power wires going to the ABS. One (black) is a ground. Two red wires are also present. One is from the battery and runs hot all the time. The other I'm not sure about, but isn't running hot ever aparently. Should this run hot from the ignition switch? Is it possible this is my problem? Also, I can't seem to find a schematic or any sort of diagram for this model. Does anyone know where to find one online? Thanks!

 

check the sensor at the hub, it may be corroded/dirty.
remove it, carefully clean it and put it back in.
just a thought. not sure though....do you have any other symptoms besides light on?