Can 7-Way and 4-Way Be Used Simultaneously for Tow Dolly and Lights?

Updated 03/21/2019 | Published 03/20/2019

Products Featured in This Question

Roadmaster Tow Dolly with Electric Brakes - 4,250 lbs

(9)

$3525.00

Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers - Ford, Lincoln, Mercury

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$18.95

Tekonsha Prodigy P2 Trailer Brake Controller - 1 to 4 Axles - Proportional

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$159.00

Universal Magnetic Tow Lights w/ Wireless Transmitter and 4-Way Flat Trailer Connector - Red LEDs

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$144.73

Hopkins Endurance Multi-Tow Twist-Mount 7-Way RV and 4-Way Flat Trailer Connector - Vehicle End

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$24.39

7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End

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$43.11

Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End

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Question:

2018 Thor Windsport Motorhome Prodigy p 2 connection I have both a 7 way and 4 way electrical connector on my motorhome can I use the 4 way connector I want the 7 way for my tow cat lights

asked by: Robert L

Expert Reply:

Since you have the 7-way and 4 way connections on your motorhome, you will have both wiring hot and ready to work. Some spring doors won't allow both to open at the same time like # HM40975 so some people will remove the door on the 4-way side to allow the door on the 7-way with the clip to help hold the 7-way plug in. Other styles like # HM40920 will allow you to use both connectors without any adapting necessary.

It sounds like you are wanting to use the Roadmaster Tow Dolly # RM-2050-1 you asked from along with additional lights like # C6304. The tow dolly will require the wiring connector for you 7-way # PK12706 to get the connection and electric brakes. Then you will need a brake controller like the Prodigy P2 # 90885 you referenced. For your 2018 Thor Windsport motorhome, there should already be a connection under the dash for the wiring adapter for your brake controller # 3035-P.