Plugging in a Tow Dolly and Magnetic Light Kit to the Same 7-Way Trailer Connector

Updated 03/14/2016 | Published 03/12/2016

Question:

HI: I currently have an RV with a 7 pole rear trailer lighting connector. Im towing a car dolly that has a 4 pole connector. I already have the adapter that goes from 7 pole to 4 pole. The Questions is: Im towing a car on the dolly and want to use rear magnetic signal and brake lights. What I need is an adapter that can handle two 4 pole connections from my 7 pole. Do you have anything like this. The part # 37385 goes from 7 pole to 4 pole and 5 pole.

asked by: Dan

Helpful Expert Reply:

You technically could use # 37385 because a 4-Way flat connector will plug into a 5-Way flat receptacle. The last pin just isn't used on the 5-Way end. The only problem is that you have to make sure that the combined power draw is not too much for the tow package wiring on the tow vehicle.

The other thing you can do is cut off the 4-Way on the magnetic kit and just splice it into the wiring for the tow dolly. But you would still need to be careful of the power draw. I do not anticipate the power draw being excessive but it's worth knowing ahead of time!

expert reply by: Michael H