Bob,
your 2006 Marquis does not have a Kongsberg chassis control system. They were installed on 2008/2009 Monaco motorhomes. Your multiplex system is an Intellitec house control system, completely different than the chassis multiplex system. On the Kongsberg control system, there is a +5volt power supply issue that controls the Smartwheel functions, with a few workarounds, that are discussed on other Monaco forums. The actual module is obsolete, a few have been found in motor home salvage yards, but are very pricey$$$$. Anyone that owns a 2008/9 Beaver Marquis, I highly recommend you research this problem, as there are very few options to address the problem. Hope this helps.