bing tracking image
Q & A Icon

Installing Trailer Brake Wiring to Existing 4-Way Trailer Wiring


I have a 4 pole plug on my my boat trailer with 5 wires. I have installed new electric brakes. Can they be wired into this five wire setup?


Expert Reply:

Since you already have the 4-way trailer connector like # 18004, to add your electric brakes you simply will use the Hopkins Endurance 5-Way Flat Trailer Wiring Kit - Vehicle and Trailer Ends - Ergonomic Design # HM47890 and match color for color with your existing 4-way. The 5th pin will be used for your trailer brakes instead of a reverse light which is the other typical application for 5-way wiring using that blue wire on the trailer side. The same will be done on the vehicle side with the 5th pin blue wire connected to your electric trailer brake controller output.

I've attached a wiring article to assist. I've also linked the page to your brake controller options to assist.

click to enlarge
expert reply by:

Products Referenced in This Question

Product Page this Question was Asked From

Q & A Icon

Similar Expert Q&A Pages

See More Q&A Expert Answers >>