Does Curt 4-Way C56040 For Subaru Allow Installation of Brake Controller

Published 11/11/2021

Products Featured in This Question

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

(3609)

$40.56

Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires

(3476)

$118.67

Question:

Which wire on the CURT 56040 Vehicle-Side Custom 4-Pin Trailer Wiring Harness is the brake signal wire to connect a brake controller signal wire to? Thanks!

asked by: Joe G

Expert Reply:

So the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56040 is just a 4-way, which means it only powers your trailer's turn signals, brake lights, and tail lights (the other wire is a ground wire).

In order to add a brake controller you would also need the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat # ETBC7.

The Curt 4-Way # C56040 will plug into the 7-way that comes with the # ETBC7, and it is the 7-way that has the wiring needed to connect a brake controller such as the Tekonsha Prodigy P3 # 90195.

I have added links below to come help articles on brake controllers and wiring for you to check out if you want to take a look.