I recommend the Tekonsha Prodigy P3 Trailer Brake Controller # 90195 for your 2017 Coachmen Sportscoach 407FW. This will connect to the factory wiring port on the left side of the steering column with a Tekonsha Plug-In Wiring Adapter # 3027-P.
I have included a picture for you to reference the plug location. view full answer...