Instructions to Wire a Trailer for Electric Brakes
Updated 05/29/2024 | Published 03/20/2015
Question:
I have a black and white wire coming from the brakes, I dont know where to plug them in the box to truck lead, color for color
asked by: Larry B
Expert Reply:
It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean metal surface on the trailer. I have included a diagram for you.
Sam
5/26/2024
Hi Leah. Found this and it is super helpful. I just wanted to ask, my understanding is that there is no polarity as such with the electric trailer brakes. So any wire can be the ground. Can I ground any of the two to any suitable surface on the trailer frame?
Kevin C.
5/29/2024
Product Page this Question was Asked From
7-Way Molded Connector w/ 15' Cable - Trailer End
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 7 Blade
- Plug and Lead
- Bargman
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Article: Trailer Wiring Diagrams
- Shop: Brake Controller
- Shop: etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector
- Shop: Trailer Wiring
- Search Results: trailer wiring
- Shop: Easy Grease Trailer Hub and Drum Assembly for 3.5K Axles - 10" - 5 on 4-1/2 - Pre-Greased
- Article: Breakaway Kit Installation for Single and Dual Brake Axle Trailers
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Search Results: trailer breakaway kit
- Search Results: trailer brakes
- Shop: Trailer Hitch
- Shop: etrailer Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand Assemblies - 3.5K
- Search Results: brake wire
- Shop: 12 Gauge 2 Conductor Jacketed (Brake) Wire Per Foot
- Search Results: trailer leaf springs
- Shop: Dexter Nev-R-Adjust Electric Trailer Brakes - 10" - Left/Right Hand Assemblies - 3.5K
- Search Results: trailer lights
- Search Results: accessories and parts
- Q&A: How to Wire Electric Brakes on a Tandem Axle Trailer
- Shop: Suspension Enhancement
- Shop: Dexter Electric Trailer Brakes - 10" - Left/Right Hand Assemblies - 3.5K
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Video: etrailer 7 Way Upgrade Kit With Junction Box Installation
- Article: Electric Trailer Brakes: How They Work & What to Buy
- Article: Brake Controller Installation: Starting from Scratch
- Video: Trailer Brakes and Wiring Installation
- Shop: Vehicle Tow Bar Brake System
- Article: How to Tell the Weight Rating of a Trailer Axle
- Article: Trailer Lighting Requirements
- Shop: Vehicle Tow Bar Wiring
on Trailer Wiring
Haden S.
6/1/2020
W/ a 4 wire harness (green, yellow, brown & white). How do you wire the electric brakes from the junction box to the hubs? Which wires Tie together to get function? I have 2 green wires coming from the hub, a red & black wire coming from the axle to tie into the passenger side brakes & the white & black brake wire. How do these all tie together from the junction box to get the brakes to function?? Thank you.