I actually just completed the backup camera install on my Monogram FR-S about a week ago with the Rydeen Duo and the autoharnesshouse harness. I didn't run into any issues with the harness or installation when I followed the directions on the site. Specifically making sure to have the reverse trigger wire properly wired per
http://www.autoharnesshouse.com/19867_add.html.
Sorry for the less than thorough response, I'm at work at the moment. If you're still having problems I'll post a more thorough response when I get off tonight. GL!