We have an ABS failure light. I came on after hitting a very large pothole in Chicago. Does anyone have any experience with this?
Probably a misaligned (or possibly damaged) sensor. If you have VMSpc, I believe it can tell you more info (since you have a 2003 with a Wabco ABS system).
(ETA there is also a switch in the dash you can use to get blink codes ABS (Anti-lock Braking System) [ForeForums Foretravel Motorcoach Wiki] (http://wiki.foreforums.com/doku.php?id=technical:abs:abs) )
First, you might try simply re-plugging the connections on the Wabco "brain" just to make sure it's not a loose connection.
My guess is you disconnected one of the cables going to a brake solinoid. On mine they are in front of the rear wheels where the air hose for the brakes come together. When putting in the air Force one mine broke apart, the lexan or plastic cover disintergrated from age and exposure to chemicals. Jack it up, put in your blocking, and look for them. Careful with the wires.
Thanks for the suggestions I will take a look at once it warms up a little