Installing A 4-Pole Trailer Harness On The Rear Of A 5th Wheel For Hauling A Boat

Question:

I want to tow a boat trailer behind my 2021 Dutchmen Yukon 5th wheel trailer. What all do I need to use to tie into the rear lights of travel trailer to wire up the lights to my boat trailer?

asked by: Walter S

Expert Reply:

To install a 4-pole connector at the rear of your 5th wheel, the easiest option would be to tap a 4 pole vehicle end harness like # 18002 into the taillight circuits of the fifth wheel.

In most states towing a trailer behind another trailer is illegal in many states, and we do not recommend doing it for safety reasons. You will also need to determine if your 2018 Ford F-250 Super Duty's tow package has a sufficient rating to handle the draw of the lights on both the fifth wheel plus the draw from the lighting on the boat trailer. The running light circuit of your factory tow package is rated at 15 amps when the stop/turn amperage is rated at 10 amps.

Each taillight will draw about up to about 2 amps, and the clearance of the marker lights with draw up to 0.5 amps each. If your total amp rating of all the lights hits the rating of the circuits mentioned above you might need to install LED lamps on the boat trailer. When using LED lamps they only draw a fraction of the power that incandescent lamps would.

I attached a review video link below.

expert reply by: Noah E