How To Wire 7-Way Plug On Vehicle Without Brake Controller
Updated 06/26/2019 | Published 06/24/2019 >
Question:
In order to just plug trailer 7way into spare battery with a 7way receptacle wired directly to battery. When connecting the 7 WAY receptacle direct to battery do you connect the black power to positive battery terminal and the white ground to negative terminal? Also if all it is powering is interior lights and exterior lights does it matter that there won’t be a fuse between lights and battery?
asked by: Josh
Expert Reply:
When wiring the 7-way receptacle on the back of the vehicle to the vehicle's battery you want to extend the black power wire to the positive side of the battery terminal via a 40 amp circuit breaker. The white wire (ground) from the 7-way receptacle should be grounded to a bare metal surface on the vehicle's frame. You still want to use the circuit breaker even if you just have lights.
Product Page this Question was Asked From
Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- 7 Blade
- Plug Only
- Pollak
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Trailer Wiring Diagrams
- Search Results: adjustable trailer ball
- Search Results: adjustable trailer coupler
- Article: Brake Controller Installation: Starting from Scratch
- Shop: Brake Controller
- Shop: Trailer Wiring
- Shop: Trailer Hitch
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Curt Universal Installation Kit for Trailer Brake Controller - 7-Way RV - 10 Gauge
- Shop: Optronics Fleet LED Trailer Tail Lights w/ Grommets - Stop,Turn,Tail - Submersible - Oval - Qty 2
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: trailer hitch
- Video: Feature Breakdown: Universal Installation Kit for Trailer Brake Controller
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: trailer wiring
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Shop: Suspension Enhancement
- Search Results: trailer tires and wheels
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Article: How to Choose the Right Trailer Hitch Class
- Search Results: trailer hitch ball mount
- Q&A: Recommended Bike Rack and Dual Hitch Adapter for Carrying E-Bikes While Flat Towing
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Search Results: trailer brake controller
- Article: How to Measure for Trailer Hitch Drop
- Q&A: Clearance Differences Between Hitches For A 2026 Honda Odyssey EX-L
- Shop: Redarc Tow-Pro Liberty Brake Controller w/ Universal Wiring Harness - Dash Knob - Proportional



