The 2001 may be an earlier version. On our 2005 Diplomat I used a jeweler's screwdriver to remove all of the screws holding the plastic smartwheel assembly (all from the bottom).
There are four wires that carry the signals for the different controls. One of yours may have a short or be broken. I had to repair mine. After the repair, the cruise control and wiper functions were restored.
Crespro
Crespro 2021 Grand Design 310GK-R, 2020 F250LB, 7.3L, 4.30, Reese 27K