Bruce,
Go back to Truk's post regarding the blink codes and then call Prevost tech support, they will walk you through running the ABS code test in about 5 minutes. The switch is in your steering bay and they will tell you where it is. On my '96 VOGUE with ABS, the light came on and Prevost quickly helped me determine it was the right front sensor, not the dreaded rear one inside the center of the rear axle. I took a 10mm wrench, removed the sensor, cleaned it and put it back in, problem solved.
I also agree with John with one exception, not having ABS, especially in a 45,000 lb plus rig will become a safety issue real fast if you find yourself in a situation where it is designed to keep the bus under control.
In race cars, we use a racing ABS set up which is not as sensitive as in a street car. The reason a pro race driver can modulate the brakes better in a street car is because the ABS system is set up for the presumed less sensitive foot and reflexes of a mere mortal. The pro driver however, can easily sense the reaction of a street ABS set up before it comes on fully. A race car with a racing ABS calibration is also much faster around a track than one without ABS because the driver can brake later and deeper before a turn.
Richard Beecher
02 Marathon XLII 45
96 VOGUE XL for sale
C63 AMG Mercedes
E63 AMG Mercedes
Porsche RSR race car (with racing ABS)