How to Charge a Trailer Battery Using a 4-Way Trailer Connector
Published 08/31/2018
Products Featured in This Question
Question:
I have a 7 way plug on my truck. the trailer is a flat 4 wire. I use the adapter 7 way to flat 4 to get trailer lights to work. my question I want to charge a battery on the trailer . whats the best way? should I use the side marker lights to charge the battery or is there an adapter or a simpler way
asked by: Aaron
Expert Reply:
The best way to maintenance charge the 12 volt auxiliary battery on your trailer would be to upgrade to a 7-way trailer connector. For this, I recommend using the Trailer Wiring 7-Way Upgrade Kit part # HS381-9000. The 12 volt hot lead (black wire) that feeds into the trailer connector will need to connected to the positive post on the battery and will work to provide a maintenance charge. However, if you need to provide an actual charge then you will need to use a battery charger instead like the Redarc BCDC Dual Battery Charger part # 331-BCDC1240D.
Product Page this Question was Asked From
Wiring Kit for Hydrastar Electric Over Hydraulic Actuators
- Accessories and Parts
- Brake Actuator
- Disc Brakes
- Hydraulic Drum Brakes
- Wiring
- Hydrastar
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: BulletProof Hitches 2-Ball Mount for 2-1/2" Hitch - 8-1/4" Drop, 8-1/2" Rise - 14K
- Video: B and W Turnoverball Underbed Gooseneck Trailer Hitch Installation - 2022 Chevrolet Silverado 2500
- Video: B and W Turnoverball Underbed Gooseneck Trailer Hitch Installation - 2020 Chevrolet Silverado 2500
- Shop: Gooseneck Hitch
- Shop: Side Window Vents
- Q&A: Does Truck with 6-1/2 ft bed Have to Use Slider Hitch for Turning Clearance with Fifth Wheel Hitch
- Q&A: Adding a Battery to a Trailer with a 4-Way Connector
- Shop: Weigh Safe Hitch w/ Built-In Scale for 2.5" Hitch, 10" Drop/11" Rise, 18.5K, Aluminum
- Shop: B&W Tow & Stow 3-Ball Mount - 2-1/2" Hitch - 8-1/2" Drop, 9" Rise - 18K
- Shop: Curt Adjustable 2-Ball Channel Mount - 2" Hitch - 10-1/8" Drop, 9-1/8" Rise - 14K
- Shop: Weigh Safe Hitch w/ Built-In Scale for 2.5" Hitch - 8" Drop/9" Rise - 22K - Steel
- Shop: Weigh Safe Aero Hitch for 2" Hitch - 10" Drop/11" Rise - 12.5K - Steel
- Shop: Patriot Hitches 5-Way 3-Ball Mount w/ Stacked Receivers - 2-1/2" Hitch - Red Accent
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: trailer hitch
- Article: Trailer Wiring Diagrams
- Shop: Trailer Hitch
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
- Search Results: trailer tires and wheels
- Article: How to Measure for Trailer Hitch Drop
- Shop: Trailer Wiring
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Search Results: trailer wiring
- Video: B&W Companion OEM 5th Wheel Hitch Manufacturer Breakdown
- Shop: Suspension Enhancement
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: What Is An OEM Prep Package And How Do I Know If I Have It
- Search Results: trailer jack
- Video: In-Depth Look at the B&W 5th Wheel to Gooseneck Pin Box
- Shop: Brake Controller
on Accessories and Parts
