Does it Matter Which Wires are Power or Ground for Electric Trailer Brakes
Question:
My trailer has 2 wires going to the magnets, white and black, I assume the black is ground, but its in the wiring harness going forward, I read in the instructions that it needed to be grounded to the backing plate or close to it, I assume its grounded to the tongue and thru the 7 way plug to truck. this is the way Haulmark trailers wired it
asked by: Rob S
Expert Reply:
It sounds like you are asking what wire should be ground and which is power for installation of the Dexter Nev-R-Adjust Electric Trailer Brake Kit # 23-458-459.
The wires can be used for either, so if you want to use the black for ground you can, and the white wires will then be the power wires. You should then connect the ground wire to the trailer frame and connect the others to power like in the cut out I added. This is from the linked help article "Parts Needed to Add Electric Drum Brakes to a Trailer."
I have also added a link to a video showing how to install electric brakes such as the Dexter Nev-R-Adjust Electric Trailer Brake Kit # 23-458-459.

Product Page this Question was Asked From
Dexter Nev-R-Adjust Electric Trailer Brakes - 12" - Left/Right Hand Assemblies - 6K
- Trailer Brakes
- Electric Drum Brakes
- Standard Grade
- Self Adjust
- 12 x 2 Inch Drum
- 6000 lbs Axle
- 14-1/2 Inch Wheel
- 15 Inch Wheel
- 16 Inch Wheel
- Dexter
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Dexter Trailer Hub and Drum Assembly - 7K E-Z Lube Axle - 8 on 6-1/2 - Pre-Greased - 1/2" Stud
- Shop: Kenda Karrier KR53 ST235/80R16 Radial Trailer Tire with 16" Silver Mod Wheel - 8 on 6-1/2
- Shop: Dexter Electric Trailer Brakes - 12" - Left/Right Hand Assemblies - 7,000 lbs
- Video: A Closer Look at the Dexter Trailer Hub and Drum Assembly
- Shop: RV Bearing
- Video: Review of Dexter Trailer Hubs and Drums - E-Z Lube Pre-Greased Trailer Hub Drum - 42866UC3-EZ
- Shop: Provider ST235/80R16 Radial Tire w/ 16" Vesper White Mod Wheel - 8 on 6-1/2 - Load Range G
- Shop: Dexter Trailer Hub and Drum Assembly - 5,200-lb to 7,000-lb E-Z Lube Axles - 8 on 6-1/2 - Galvanized
- Q&A: Does It Matter Which Wire is Power and Which is Ground When Wiring Electric Brakes
- Video: Comprehensive Review: Dexter Electric Trailer Brakes
- Shop: Dexter Trailer Hub and Drum Assembly for 5,200-lb to 7,000-lb Axles - 12" - 8 on 6-1/2
- Video: etrailer VS Dexter Self Adjusting Brakes Comparison
- Article: Trailer Wiring Diagrams
- Search Results: rv door locks
- Q&A: Double-Lip Grease Seals to Replace AL-KO Part 363497
- Search Results: 363497
- Search Results: drum brakes
- Q&A: Similar Tire Size Replacement for 7.50x16 That Is Radial Construction
- Q&A: What Is The Difference Between the 6K and 7K Dexter Axle Electric Brake Assemblies
- Q&A: Trailer Breakaway Kit that Can be Used with Tandem Axle Trailer
- Search Results: breakaway
- Shop: etrailer Electric Trailer Brakes w/ Dust Shields - Self-Adjusting - 12-1/4" - Left/Right - 10K
- Search Results: hayes electric brakes
- Shop: Trailer Hitch
- Shop: Brake Controller
- Q&A: Instructions to Wire a Trailer for Electric Brakes
- Search Results: 23~468~469
- Video: Review of the Easy Grease Trailer Hub and Drum Assembly for 5.2K
- Video: Complete Breakdown of the Dexter Trailer Hub and Drum Assembly
- Q&A: Correct Way to Wire Trailer Breakaway Kit