The Tow Ready Multi-Plug T-One Connector Assembly, part # 20135 is a replacement for Chrysler, Jeep, Freightliner and Mitsubishi OEM trailer connectors.
For your Montana, I would recommend using Curt Connector, part # C55355 in conjunction with part # ETBC7 if you are wanting to install a brake controller. The Brake Controller Install Kit, part # ETBC7 includes everything necessary to install a brake controller, as well as the adapter to convert the 4-pole provided by part # C55355 to... view full answer...
First of all, you will need to install a brake controller. I would recommend a proportional controller, such as the Tekonsha Prodigy P2 part # 90885. To install the controller, we offer a Brake Controller Install Kit, part # ETBC7. The kit includes everything necessary for installing your controller, including the 4 to 7-way adapter.
The adapter would plug into your existing 4-way plug, with four wires remaining. The blue wire would run to the passenger compartment, to carry the output... view full answer...