Creating a 6-Way Round to 5-Way Flat Trailer Wiring Adapter

Updated 08/19/2025 | Published 07/25/2018

Products Featured in This Question

Hopkins Trailer Connector Adapter - 6-Pole Round to 6-Pole Square

(21)

$16.77

Hopkins Endurance 5-Way Flat Trailer Connector - Vehicle End - Ergonomic Design

(51)

$14.97

Question:

2005 National Seabreeze LX with a 6 pole wire connector by the hitch. My new boat has a flat 5 connector is there an adapter for 6 to 5?

asked by: Brian T

Expert Reply:

We do not carry a 6-way to 5-way adapter, so I recommend making one using the Hopkins Trailer Connector Adapter - 6-Pole Round to 6-Pole Square # HM47415 and removing the 6-pole square to replace with the Hopkins Endurance 5-Way Flat Trailer Connector - Vehicle End - Ergonomic Design # HM47900. You won't use the 12V feature so I recommend removing that wire from the 6-way so it doesn't draw any power.

I've attached a wiring article to help with the connections.

expert reply by: Jason S

James

8/18/2025

I have a 6 wire lead from the truck wiring harness for the trailer but a 5 wire adapter plug in. How do I match the wiring to work

Robin H.

8/19/2025

@James are you saying you want to replace the connector on your truck and use the # HM47900? The functions are marked on that connector so all you need to do is connect the corresponding wire on the Hopkins. If you aren't sure which is which on the vehicle I recommend using a tester since colors aren't always reliable.