Jon-
Herein find what you need, but note some of the instruction may vary per your specific coach. Sometimes the built-in level sensor gets off for whatever reason, and needs recalibrating. Forgive the quality of the instruction sheets from HWH; they are the best rendition I got in 2006, copies of copies of poor faxes they sent. The photos are of my own control box, upside down on the ceiling of the electrical bay (street side frontmost bay). Yours should be basically identical. The adjustor in question is on the top corner of the box, on the side of the box to your left and toward the back wall (see photos); you'll have to push aside some wiring harnesses and connectors to get at it.
-Joel
Since the total kb of 4 images exceeds the 1MB limit per post here, and this tablet doesn't edit to smaller resolution, please find the 4th image in the next post.