7-Way Recommendation for the Rear of Trailer for Attaching Second Trailer

Question:

going from the four flat to the 7 round to pull doubles will this work with my electric trailer brakes the for flag comes off my fifth wheel and the second trailer is a 7 round fifth wheel and second trailer both have electric trailer brakes will this work on the second trailer

asked by: Darrin

Expert Reply:

Sounds like you are towing two trailers that both have trailer brakes. As long as the brake output circuit is completed from one trailer to the next the part # C57674 would work to send the amperage to each trailer. You will want to be sure that each trailer has 10 gauge wire for the brake output circuit like part # 10-1-1 (sold by the foot).

The blue wire of this adapter would need to get run to the output of a brake controller that is designed to handle the amount of brake assemblies your two trailers have.

Or, if you are planning on using the # C57674 on your first trailer for attaching to the wiring of the second trailer this would work as well. It would be just a matter of connecting each of the wires to the correct circuit to get it to work right.

Typically we recommend that people do not tow two trailers. Also, it is not legal in all areas so you would need to contact your DOT.

expert reply by: Jameson C