Wiring Connection on 2017 Thor Compass RV to Roadmaster Tow Dolly RM-2000-1 & Magnetic Lights


The compass is on a Ford Transit HD350 chassis. I plan on purchasing the RM-2000-1 tow dolly and the Tekonsha 90885 brake controller so I want both the dolly lighting and electric brakes to work using a simple plug connection. I also want to purchase the RM-2120 tow lights so will they require an entirely different plugin? Thanks.


Expert Reply:

For an easy electrical hookup between your 2017 Thor Compass RV and the Roadmaster Tow Dolly # RM-2000-1 my recommendation is to wire in a 7-way RV style socket/plug combination.

Since the dolly comes only with 4-pole wiring you will need a 7-way trailer-side plug like 8-foot # H20046 or 6-foot # H20044 and a junction box like # 38656 to install the 7-way on the dolly. You can use ring terminals like # 44-5310A. This 7-way will carry all lighting signals plus the brake controller's output to operate the dolly's electric brakes.

On the RV you will want to install the Hopkins Endurance Multi-Tow 7-, 5- and 4-Way Flat Vehicle Socket # HM48470 which has BOTH a 7-way connector for the dolly's new 7-way plug and a 4-pole for the magnetic towing lights # RM-2120. This 7-way/4-pole vehicle-side socket has screw terminals on its rear for making all connections to the RV wiring.

You can refer to the linked article for help with the wiring configuration.

expert reply by:
Adam R

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