Well, recheck your sensors - after that, you’ll have to find a heavy truck shop that used to work on Workhorse, many of them are now also Navistar shops. It takes a special reader to see the codes in the ABS for the Workhorse.
The shop that did the recall brake work on ours, I had him replace the pads all around and do a lube job and check the reason for the ABS.
He was a good old boy at a Navistar/exWorkhorse truck shop - his report came back, bad sensor on driver front, and that plug I told you about.
I drove the coach for a year with the ABS light on and that sensor unplugged - you have brakes, but not ABS. Finally got around to replacing the sensor - 10 minute job - was barely out of the driveway when the ABS light went off, and (knock on wood) has not been back on since (other than when turning key on to start the engine).
Shop around for sensors - you can find a wide range of prices for the same part. Don’t recall where I got mine.
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