2002 Freightliner Century Low volt at abs ecu?

It says you have a bad sensor or wire to the sensor on third axle. Check wiring from each wheel. Buy a new one and switch it out with either side. To find out which one is bad. Usually you’ll see a broken/ damaged wire. I just replaced 1 that looked fine. Otherwise it’s the sensor itself. You should be able to do blink code self diagnosis

 

They should have narrowed it down to which wheel is affected. They basically took your money for nothing

 

Maybe the ABS wheels are shot, perhaps that is why they didnt wanna put there neck on the line with the ABS issue, which i dont understand why they wouldnt ABS sensors compared to most parts are decently priced, maybe they dont have a good scanner....

 

There’s either a button on dash or on ecu ( maybe located under bunk behind passengers seat. Turn key on and hit switch for 1-2 seconds, then count blinks on dash. Get number and post it

 

Web site abstroubleshooting.com has a list of codes for wabco systems

 

The repair order say low voltage at abs, which is called a voltage drop. I could explain it more in depth, but basically somewhere between the abs power source (batteries) and that connection on the abs electrical circuit you have something stealing voltage. ( Split wire, bad connection etc. ) .
When testing 2 ends of a live wire with a multimeter in volts the reading when no problems are present should be 0. Multimeter in volts measures potential difference.
If I cut the same wire and leave 1 strand attached and now measure the live wire with the cut on both ends. That reading won't be 0.

If you had some of there readings I'd be able to help.