Ok first thing first, my car is a 2000 trans am ws6, 6spd without traction control. I had a code for a Valve Relay circuit malfunction C0121, but it ended up being the ABS BATT mini fuse so that code went away but I still have a code for a rear wheel speed sensor, forgot the code number.
Heres where it gets confusing, I had the car hooked up to a scan tool from my work, and watched the wheel speed sensors, when I was going 40mph, the front wheels read 40 and both the rear wheels read like 20mph, I locked up the wheels a few times and the abs does not go on, but for some reason the abs will randomly make my brake pedal hard when I go to stop, I would assume that is probably from the sensors being off.
Now this is what I really don't get, my car doesn't have traction control but I have a wheel speed sensor for both rear wheels, not the single sensor in the differential, I thought only traction control cars had individual sensors. I put my car on the lift and had another mechanic spin the driver side tire while I was watching the scan tool, both rear wheels read 2mph, didn't make sense since the passenger tire was barely spinning, so I unplugged the harness from the wss on the pass side, and spun the tires again, still read 2 mph for both rear sensors, I then switched to the passenger side, pluged it the harness back in and had the other kid hold the driver side tire and I spun the passenger tire, the scan tool read nothing. Pretty much to sum that up only the driver side tire reads for both rear sensors, pass side sensor does nothing. But the rear sensors are still off from the front two. Im guessing maybe a possible short somewhere...Any ideas??