How to Wire a Breakaway System

Updated 03/15/2018 | Published 03/13/2018

Products Featured in This Question

Hook Probe Circuit Tester

(60)

$12.27

Hopkins Engager Trailer Breakaway Kit w/ Charger, LED Tester, and 5 Ah Battery - Side Load

(746)

$60.86

Question:

The charging system. After doing some troubleshooting I discovered I had voltage on the white wire. I only two wires coming from j box inside the channel on the frame. I looked inside and what a bunch of tangled mess. The black wire went from battery to the break away switch. Do that switch ever go bad? Does the charging system go through that switch?

asked by: Richard

Helpful Expert Reply:

The 12-volt circuit which is generally located in the 1 o'clock position on the vehicle's 7-way trailer connector will be used to maintain a charge on the battery for your breakaway system. This is usually a black wire, but you will want to use a circuit tester like part # PTW2993 to be sure. It should not travel through the switch itself.

I would not be able to confirm what color wire represents what function unless I knew the exact model of your breakaway system. However, most systems have 3 wires coming from the box and 2 wires from the switch. The three wires coming from the box are usually: black for the 12-volt power, white for ground, and blue for the brake output. The two wires coming from the switch are just spliced into the brake output to apply power should the trailer detach. I have attached a sample diagram for you below.

With that being said, I recommend replacing the system so you are able to ensure everything is in working order and is wired correctly. One of our most top rated systems is the Hopkins Engager Push-To-Test Trailer Breakaway Kit part # 20099. This system comes with everything you need including switch, pin, and battery. I have attached a review/install video on this system for you as well.

expert reply by: Conner L