Can Trailer Ground be Added to White Wire From Brakes
Updated 10/27/2025 | Published 03/05/2025
Question:
My trailer brakes are wired to the Blue and White wires coming from the 7-pin connector. I would like to add a ground to the trailer, do I go directly to the white wire?
asked by: Cain
0
Expert Reply:
Hey Cain, thanks for reaching out!
As long as the white wire is for the ground then yes, you can add a main ground to the white wire on your 7-Way connector and that would be the way to go.
If you aren't sure whether the blue or white is connected to the ground, you can either use a circuit tester # PTW2992 to see which one has 12V power, or you can check out the attached 7-Way pinout diagram to see where your white wire ends up.
expert reply by:
Jon G
0
7-Way RV Wiring Connector Pinout
(click to enlarge)
(click to enlarge)
Continue Researching
- Shop: Brake Controller
- Shop: Trailer Wiring
- Search Results: vehicle tow bar wiring
- Search Results: accessories and parts
- Search Results: etrailer accessories and parts
- Q&A: How To Replace 7-Way Trailer Connector On Trailer with 5 Wires
- Video: Review of TowSmart Trailer Wiring - 7 Blade Trailer Connector With Jacketed Cable - TS74RR
- Shop: Rubber Window Edge Weather Strip for RVs - Press In - 20' Long x 1/2" Tall
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: Trailer Wiring Diagrams
- Article: Breakaway Kit Installation for Single and Dual Brake Axle Trailers
- Article: How to Charge a Trailer Battery While Driving: 3 Common Problems (And How to Fix Them)
- Q&A: Recommended Brake Controller for 2019 Cadillac Escalade With Factory Tow Package
- Q&A: How to Charge a Trailer Battery Through a 7-Way Connector
- Q&A: Can I Charge My Trailer Battery Using 7-Way Trailer Connector on Truck
- Q&A: Short Circuit in Trailer Connector Melted Wiring and Causes Trailer Brakes to Lock Up
- Q&A: Can You Use a Breakaway Battery to Power an Electric Trailer Tongue Jack
- Q&A: 7-Way RV Trailer Connector Wiring Diagram
- Shop: Rubber Window Edge Weather Strip for RVs - Press In - 30' Long x 19/32" Tall
- Shop: Rear View Safety Switcher Box
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Video: How to Choose a Trailer Brake Controller
- Search Results: trailer hitch
- Shop: Trailer Hitch
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Video: What to Know About the Curt TriFlex NEXT Trailer Brake Controller
- Search Results: trailer wiring
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Curt Echo Wireless Brake Controller - 7-Way Plug-in w/ Bluetooth App - Up to 2 Axles - Proportional
- Shop: Suspension Enhancement
Explore Expert Info
![Our Expert]()
on Trailer Wiring
on Trailer Wiring
Jon G.
10/27/2025
Hey Cain, did you get a chance to test the white wire on your 7-way connector to confirm it was the ground? Knowing how that worked out could help others trying to wire their trailer brakes correctly.