Our 04 Allure has the Type 42 steps in it. I found the ground wire needed some attention. As we were seeing intermittent mind of it's own operation.
If it purists unit you get it solved, for travel, get the steps in and then pull the appropriate fuse...
Please close the loop back on what you determine, as it might help others in the future too
Travel safe, have fun - and watch that first step at 65MPH