Can I Charge Trailer Batteries Using The 12V Aux Terminal On A 7 Way Plug
Updated 11/06/2023 | Published 11/04/2023
Products Featured in This Question
Question:
Would I be able to wire a 7 pin make plug to charge a 12v battery inside my trailer using the female hitch plug on my truck? Picture added for reference of where the idea came from.
asked by: Gabriel C
Expert Reply:
Yes, the 12 Volt auxiliary terminal (red) on your 7-way connector can be used to keep the battery on your trailer charged. You will need to run a 10 gauge power wire like # 10-1-1 from the 12 volt auxiliary terminal on the 7-Way trailer connector on the trailer to the positive terminal on the trailer battery and ground the negative terminal of the trailer battery to the trailer frame. If your trailer does not already have a 7 way plug, you can use a 7-way plug # PK12706 along with some 7 wire # DW04914-1, which is sold by the foot.
It is important to note that this will allow you to maintain a charge on your trailer battery, it will not charge the battery from a discharged state.
Continue Researching
- Shop: Vehicle Tow Bar Brake System
- Q&A: Can a Trailer Battery be Charged with a 7-Way Trailer Connector
- Video: Install: Roadmaster InvisiBrake Flat Tow Brake System on a 2016 Jeep Wrangler Unlimited
- Search Results: air brakes flat tow brake system
- Search Results: brake controller
- Search Results: 7 pole to 4 pole adapter
- Shop: Roadmaster InvisiBrake Flat Tow Brake System - Preset
- Shop: Blue Ox Patriot Portable Flat Tow Brake System - Proportional
- Shop: Curt Trailer Connector Adapter - 7-Way RV Style to 4-Way Flat - 60" Cord
- Q&A: Is Breakaway Light Supposed to Be On While Using Blue Ox Patriot Braking System BRK2012
- Q&A: Troubleshooting "C" Connection Error Code on Older Blue Ox Patriot Brake Control Unit
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Search Results: trailer hitch
- Article: Trailer Wiring Diagrams
- Shop: Trailer Hitch
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Search Results: trailer wiring
- Shop: Trailer Wiring
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Video: An In-Depth Look at the Roadmaster Battery Charge Line Kit for Towed Vehicles
- Shop: Suspension Enhancement
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Search Results: trailer tires and wheels
- Video: An In-Depth Look at the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit
- Shop: Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord
- Q&A: Comparing Kenda KR03, KR35, And KR53 Tires
- Search Results: trailer jack
- Article: How to Measure Your Trailer Wheel Bolt Pattern
on Custom Fit Vehicle Wiring
