Your 2015 American Coach Revolution motor home, built on a Freightliner chassis, does have a brake controller port under the dash but we do not have a quick-connect plug-in harness to connect it to a brake controller like the excellent Prodigy P3, part # 90195.
You can still do a hard-wired install for your P3 by wiring the included pigtail harness to the wires leading to your under-dash port. It is a good idea to test those 4 wires, or confirm with your dealer what function each carries,... view full answer...