Compatibility of Boat Trailer with Electric Brakes With 7-Way Extension Adapter

Updated 06/19/2020 | Published 06/12/2020

Products Featured in This Question

Curt Trailer Connector Adapter - 7-Way RV Style to 5-Way Flat - 60" Cord

(34)

$47.90

Wiring Kit for Hydrastar Electric Over Hydraulic Actuators

(12)

$83.84

Question:

Will this extension also operate brakes on boat trailer with electric brakes....blinkers and light work...my old one had 6 pins with center on 7 way..this one only has 4 pins..

asked by: Rick S

Expert Reply:

The Curt Trailer Connector Adapter - 7-Way RV Style to 5-Way Flat - 60" Cord # C57281 will give you the lights, turn signals, and reverse lockout that could be used for a hydraulic surge brake lockout. It does not give you the electric brake function.

It sounds like you only have a 4-way but want a 5-way for electric brakes, but it also sounds like you have a 7 way to convert. My recommendation is to change the trailer side wiring using the Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector # HS381-9000 to give you all your features and simply disconnect the electrical before putting the trailer in the water.

expert reply by: Jason S

Doug S.

6/16/2020

What does the 5th pole of the flat connector correspond to on the 7 pole towing end of the C57281 Adapter? I'm looking for a 7 pole to 5 pole with the 5th pole being the 12v power wire.

Chris R.

6/19/2020

The 5th pin would be drawing from the reverse lights circuit/pin on the tow vehicle's 7-Way. There isn't an adapter available that connects the 5th pin to the 7-Way's 12V circuit.